diff --git a/ast/node.go b/ast/node.go
index e85f853e9..253682bd1 100644
--- a/ast/node.go
+++ b/ast/node.go
@@ -10,6 +10,8 @@ import (
 
 // Node represents items of abstract syntax tree.
 type Node interface {
+	SubExpr() string
+	SetSubExpr(string)
 	Location() file.Location
 	SetLocation(file.Location)
 	Type() reflect.Type
@@ -24,6 +26,7 @@ func Patch(node *Node, newNode Node) {
 
 type base struct {
 	loc      file.Location
+	subExpr  string
 	nodeType reflect.Type
 }
 
@@ -31,6 +34,14 @@ func (n *base) Location() file.Location {
 	return n.loc
 }
 
+func (n *base) SubExpr() string {
+	return n.subExpr
+}
+
+func (n *base) SetSubExpr(s string) {
+	n.subExpr = s
+}
+
 func (n *base) SetLocation(loc file.Location) {
 	n.loc = loc
 }
diff --git a/bench_test.go b/bench_test.go
index 1f7f14769..334c3f755 100644
--- a/bench_test.go
+++ b/bench_test.go
@@ -401,19 +401,40 @@ func Benchmark_realWorld_reuseVm(b *testing.B) {
 func Benchmark_realWorldInsane(b *testing.B) {
 	env := real_world.NewEnv()
 	expression := `(UserAgentDevice == 'DESKTOP') and (Segments[0].Origin in ['HKT','GOJ'] and Segments[0].Destination in ['HKT','GOJ'] or Segments[0].Origin in ['SKG','GOJ'] and Segments[0].Destination in ['SKG','GOJ'] or Segments[0].Origin in ['SSH','SVX'] and Segments[0].Destination in ['SSH','SVX'] or Segments[0].Origin in ['AYT','LED'] and Segments[0].Destination in ['AYT','LED'] or Segments[0].Origin in ['PUJ','KRR'] and Segments[0].Destination in ['PUJ','KRR'] or Segments[0].Origin in ['USM','CEK'] and Segments[0].Destination in ['USM','CEK'] or Segments[0].Origin in ['SHJ','LED'] and Segments[0].Destination in ['SHJ','LED'] or Segments[0].Origin in ['MOW','PRG'] and Segments[0].Destination in ['MOW','PRG'] or Segments[0].Origin in ['BKK','NOZ'] and Segments[0].Destination in ['BKK','NOZ'] or Segments[0].Origin in ['NHA','GOJ'] and Segments[0].Destination in ['NHA','GOJ'] or Segments[0].Origin in ['HRG','VOG'] and Segments[0].Destination in ['HRG','VOG'] or Segments[0].Origin in ['CFU','MSQ'] and Segments[0].Destination in ['CFU','MSQ'] or Segments[0].Origin in ['UFA','PUJ'] and Segments[0].Destination in ['UFA','PUJ'] or Segments[0].Origin in ['OMS','PUJ'] and Segments[0].Destination in ['OMS','PUJ'] or Segments[0].Origin in ['SKG','MSQ'] and Segments[0].Destination in ['SKG','MSQ'] or Segments[0].Origin in ['SSH','VOZ'] and Segments[0].Destination in ['SSH','VOZ'] or Segments[0].Origin in ['SSH','EGO'] and Segments[0].Destination in ['SSH','EGO'] or Segments[0].Origin in ['UUS','NHA'] and Segments[0].Destination in ['UUS','NHA'] or Segments[0].Origin in ['PUJ','MCX'] and Segments[0].Destination in ['PUJ','MCX'] or Segments[0].Origin in ['NHA','VVO'] and Segments[0].Destination in ['NHA','VVO'] or Segments[0].Origin in ['SKD','MOW'] and Segments[0].Destination in ['SKD','MOW'] or Segments[0].Origin in ['REN','NHA'] and Segments[0].Destination in ['REN','NHA'] or Segments[0].Origin in ['ASF','VRA'] and Segments[0].Destination in ['ASF','VRA'] or Segments[0].Origin in ['YKS','VRA'] and Segments[0].Destination in ['YKS','VRA'] or Segments[0].Origin in ['MOW','RIX'] and Segments[0].Destination in ['MOW','RIX'] or Segments[0].Origin in ['HER','IEV'] and Segments[0].Destination in ['HER','IEV'] or Segments[0].Origin in ['HRG','EGO'] and Segments[0].Destination in ['HRG','EGO'] or Segments[0].Origin in ['MOW','ATH'] and Segments[0].Destination in ['MOW','ATH'] or Segments[0].Origin in ['EGO','SSH'] and Segments[0].Destination in ['EGO','SSH'] or Segments[0].Origin in ['CEK','CUN'] and Segments[0].Destination in ['CEK','CUN'] or Segments[0].Origin in ['VAR','MOW'] and Segments[0].Destination in ['VAR','MOW'] or Segments[0].Origin in ['ASF','NHA'] and Segments[0].Destination in ['ASF','NHA'] or Segments[0].Origin in ['SKG','OVB'] and Segments[0].Destination in ['SKG','OVB'] or Segments[0].Origin in ['CUN','VOZ'] and Segments[0].Destination in ['CUN','VOZ'] or Segments[0].Origin in ['HRG','OVB'] and Segments[0].Destination in ['HRG','OVB'] or Segments[0].Origin in ['LED','VAR'] and Segments[0].Destination in ['LED','VAR'] or Segments[0].Origin in ['OMS','CUN'] and Segments[0].Destination in ['OMS','CUN'] or Segments[0].Origin in ['PUJ','NOZ'] and Segments[0].Destination in ['PUJ','NOZ'] or Segments[0].Origin in ['CUN','OMS'] and Segments[0].Destination in ['CUN','OMS'] or Segments[0].Origin in ['BAX','NHA'] and Segments[0].Destination in ['BAX','NHA'] or Segments[0].Origin in ['TDX','TJM'] and Segments[0].Destination in ['TDX','TJM'] or Segments[0].Origin in ['BKK','YKS'] and Segments[0].Destination in ['BKK','YKS'] or Segments[0].Origin in ['PUJ','MRV'] and Segments[0].Destination in ['PUJ','MRV'] or Segments[0].Origin in ['KUF','MOW'] and Segments[0].Destination in ['KUF','MOW'] or Segments[0].Origin in ['NHA','YKS'] and Segments[0].Destination in ['NHA','YKS'] or Segments[0].Origin in ['UFA','CUN'] and Segments[0].Destination in ['UFA','CUN'] or Segments[0].Origin in ['MIR','MOW'] and Segments[0].Destination in ['MIR','MOW'] or Segments[0].Origin in ['OVB','PUJ'] and Segments[0].Destination in ['OVB','PUJ'] or Segments[0].Origin in ['SGN','KJA'] and Segments[0].Destination in ['SGN','KJA'] or Segments[0].Origin in ['UTP','CEK'] and Segments[0].Destination in ['UTP','CEK'] or Segments[0].Origin in ['SKG','IEV'] and Segments[0].Destination in ['SKG','IEV'] or Segments[0].Origin in ['PKC','MOW'] and Segments[0].Destination in ['PKC','MOW'] or Segments[0].Origin in ['NHA','OGZ'] and Segments[0].Destination in ['NHA','OGZ'] or Segments[0].Origin in ['USM','UFA'] and Segments[0].Destination in ['USM','UFA'] or Segments[0].Origin in ['KGD','VRA'] and Segments[0].Destination in ['KGD','VRA'] or Segments[0].Origin in ['TDX','KZN'] and Segments[0].Destination in ['TDX','KZN'] or Segments[0].Origin in ['KRR','CUN'] and Segments[0].Destination in ['KRR','CUN'] or Segments[0].Origin in ['DXB','PEE'] and Segments[0].Destination in ['DXB','PEE'] or Segments[0].Origin in ['AER','KUF'] and Segments[0].Destination in ['AER','KUF'] or Segments[0].Origin in ['REN','SSH'] and Segments[0].Destination in ['REN','SSH'] or Segments[0].Origin in ['HKT','NJC'] and Segments[0].Destination in ['HKT','NJC'] or Segments[0].Origin in ['AER','CUN'] and Segments[0].Destination in ['AER','CUN'] or Segments[0].Origin in ['ETH','SVX'] and Segments[0].Destination in ['ETH','SVX'] or Segments[0].Origin in ['SSH','CEK'] and Segments[0].Destination in ['SSH','CEK'] or Segments[0].Origin in ['BKK','UFA'] and Segments[0].Destination in ['BKK','UFA'] or Segments[0].Origin in ['SVX','SKG'] and Segments[0].Destination in ['SVX','SKG'] or Segments[0].Origin in ['BKK','VOG'] and Segments[0].Destination in ['BKK','VOG'] or Segments[0].Origin in ['SKG','MOW'] and Segments[0].Destination in ['SKG','MOW'] or Segments[0].Origin in ['NHA','NOZ'] and Segments[0].Destination in ['NHA','NOZ'] or Segments[0].Origin in ['YKS','OVB'] and Segments[0].Destination in ['YKS','OVB'] or Segments[0].Origin in ['UFA','VRA'] and Segments[0].Destination in ['UFA','VRA'] or Segments[0].Origin in ['MOW','TCI'] and Segments[0].Destination in ['MOW','TCI'] or Segments[0].Origin in ['ASF','PUJ'] and Segments[0].Destination in ['ASF','PUJ'] or Segments[0].Origin in ['GOJ','CUN'] and Segments[0].Destination in ['GOJ','CUN'] or Segments[0].Origin in ['ASF','CUN'] and Segments[0].Destination in ['ASF','CUN'] or Segments[0].Origin in ['SGN','CEK'] and Segments[0].Destination in ['SGN','CEK'] or Segments[0].Origin in ['TJM','SSH'] and Segments[0].Destination in ['TJM','SSH'] or Segments[0].Origin in ['UTP','KZN'] and Segments[0].Destination in ['UTP','KZN'] or Segments[0].Origin in ['HRG','REN'] and Segments[0].Destination in ['HRG','REN'] or Segments[0].Origin in ['HKT','KJA'] and Segments[0].Destination in ['HKT','KJA'] or Segments[0].Origin in ['BEG','MOW'] and Segments[0].Destination in ['BEG','MOW'] or Segments[0].Origin in ['OMS','SSH'] and Segments[0].Destination in ['OMS','SSH'] or Segments[0].Origin in ['MSQ','SKG'] and Segments[0].Destination in ['MSQ','SKG'] or Segments[0].Origin in ['BKK','HTA'] and Segments[0].Destination in ['BKK','HTA'] or Segments[0].Origin in ['TDX','PEE'] and Segments[0].Destination in ['TDX','PEE'] or Segments[0].Origin in ['SKG','MRV'] and Segments[0].Destination in ['SKG','MRV'] or Segments[0].Origin in ['SGN','OVB'] and Segments[0].Destination in ['SGN','OVB'] or Segments[0].Origin in ['SVX','HRG'] and Segments[0].Destination in ['SVX','HRG'] or Segments[0].Origin in ['HKT','AER'] and Segments[0].Destination in ['HKT','AER'] or Segments[0].Origin in ['CEE','CUN'] and Segments[0].Destination in ['CEE','CUN'] or Segments[0].Origin in ['NHA','SVX'] and Segments[0].Destination in ['NHA','SVX'] or Segments[0].Origin in ['CUN','GOJ'] and Segments[0].Destination in ['CUN','GOJ'] or Segments[0].Origin in ['MOW','OGZ'] and Segments[0].Destination in ['MOW','OGZ'] or Segments[0].Origin in ['SCW','SSH'] and Segments[0].Destination in ['SCW','SSH'] or Segments[0].Origin in ['PUJ','PEE'] and Segments[0].Destination in ['PUJ','PEE'] or Segments[0].Origin in ['CUN','ASF'] and Segments[0].Destination in ['CUN','ASF'] or Segments[0].Origin in ['AQJ','SVX'] and Segments[0].Destination in ['AQJ','SVX'] or Segments[0].Origin in ['VRA','IKT'] and Segments[0].Destination in ['VRA','IKT'] or Segments[0].Origin in ['SHJ','SVX'] and Segments[0].Destination in ['SHJ','SVX'] or Segments[0].Origin in ['NBC','VRA'] and Segments[0].Destination in ['NBC','VRA'] or Segments[0].Origin in ['HTA','CUN'] and Segments[0].Destination in ['HTA','CUN'] or Segments[0].Origin in ['MOW','TOF'] and Segments[0].Destination in ['MOW','TOF'] or Segments[0].Origin in ['NJC','CUN'] and Segments[0].Destination in ['NJC','CUN'] or Segments[0].Origin in ['CUN','NOZ'] and Segments[0].Destination in ['CUN','NOZ'] or Segments[0].Origin in ['BTK','NHA'] and Segments[0].Destination in ['BTK','NHA'] or Segments[0].Origin in ['PUJ','OMS'] and Segments[0].Destination in ['PUJ','OMS'] or Segments[0].Origin in ['HTA','OVB'] and Segments[0].Destination in ['HTA','OVB'] or Segments[0].Origin in ['AQJ','KZN'] and Segments[0].Destination in ['AQJ','KZN'] or Segments[0].Origin in ['DXB','VOZ'] and Segments[0].Destination in ['DXB','VOZ'] or Segments[0].Origin in ['NHA','PEE'] and Segments[0].Destination in ['NHA','PEE'] or Segments[0].Origin in ['HKT','OGZ'] and Segments[0].Destination in ['HKT','OGZ'] or Segments[0].Origin in ['KLV','MOW'] and Segments[0].Destination in ['KLV','MOW'] or Segments[0].Origin in ['MRV','SKG'] and Segments[0].Destination in ['MRV','SKG'] or Segments[0].Origin in ['SKG','LED'] and Segments[0].Destination in ['SKG','LED'] or Segments[0].Origin in ['AQJ','MOW'] and Segments[0].Destination in ['AQJ','MOW'] or Segments[0].Origin in ['MOW','NHA'] and Segments[0].Destination in ['MOW','NHA'] or Segments[0].Origin in ['ARH','HRG'] and Segments[0].Destination in ['ARH','HRG'] or Segments[0].Origin in ['SGN','AER'] and Segments[0].Destination in ['SGN','AER'] or Segments[0].Origin in ['VRA','MCX'] and Segments[0].Destination in ['VRA','MCX'] or Segments[0].Origin in ['BKK','OVB'] and Segments[0].Destination in ['BKK','OVB'] or Segments[0].Origin in ['AYT','UFA'] and Segments[0].Destination in ['AYT','UFA'] or Segments[0].Origin in ['SGN','NOZ'] and Segments[0].Destination in ['SGN','NOZ'] or Segments[0].Origin in ['SGN','NBC'] and Segments[0].Destination in ['SGN','NBC'] or Segments[0].Origin in ['MOW','BEG'] and Segments[0].Destination in ['MOW','BEG'] or Segments[0].Origin in ['TDX','BQS'] and Segments[0].Destination in ['TDX','BQS'] or Segments[0].Origin in ['KRR','NHA'] and Segments[0].Destination in ['KRR','NHA'] or Segments[0].Origin in ['NHA','SGC'] and Segments[0].Destination in ['NHA','SGC'] or Segments[0].Origin in ['NHA','UFA'] and Segments[0].Destination in ['NHA','UFA'] or Segments[0].Origin in ['NHA','ARH'] and Segments[0].Destination in ['NHA','ARH'] or Segments[0].Origin in ['EGO','VRA'] and Segments[0].Destination in ['EGO','VRA'] or Segments[0].Origin in ['BCN','MOW'] and Segments[0].Destination in ['BCN','MOW'] or Segments[0].Origin in ['TDX','ROV'] and Segments[0].Destination in ['TDX','ROV'] or Segments[0].Origin in ['TSN','MOW'] and Segments[0].Destination in ['TSN','MOW'] or Segments[0].Origin in ['GOJ','HRG'] and Segments[0].Destination in ['GOJ','HRG'] or Segments[0].Origin in ['BKK','KZN'] and Segments[0].Destination in ['BKK','KZN'] or Segments[0].Origin in ['NHA','ROV'] and Segments[0].Destination in ['NHA','ROV'] or Segments[0].Origin in ['DXB','KJA'] and Segments[0].Destination in ['DXB','KJA'] or Segments[0].Origin in ['PEE','AER'] and Segments[0].Destination in ['PEE','AER'] or Segments[0].Origin in ['DXB','CEK'] and Segments[0].Destination in ['DXB','CEK'] or Segments[0].Origin in ['PUJ','ASF'] and Segments[0].Destination in ['PUJ','ASF'] or Segments[0].Origin in ['KBV','OVB'] and Segments[0].Destination in ['KBV','OVB'] or Segments[0].Origin in ['MOW','EVN'] and Segments[0].Destination in ['MOW','EVN'] or Segments[0].Origin in ['IKT','CUN'] and Segments[0].Destination in ['IKT','CUN'] or Segments[0].Origin in ['KGD','HRG'] and Segments[0].Destination in ['KGD','HRG'] or Segments[0].Origin in ['KBV','PEE'] and Segments[0].Destination in ['KBV','PEE'] or Segments[0].Origin in ['VOG','VRA'] and Segments[0].Destination in ['VOG','VRA'] or Segments[0].Origin in ['MOW','HKT'] and Segments[0].Destination in ['MOW','HKT'] or Segments[0].Origin in ['NHA','ASF'] and Segments[0].Destination in ['NHA','ASF'] or Segments[0].Origin in ['LED','SVX'] and Segments[0].Destination in ['LED','SVX'] or Segments[0].Origin in ['AAQ','CUN'] and Segments[0].Destination in ['AAQ','CUN'] or Segments[0].Origin in ['BKK','KEJ'] and Segments[0].Destination in ['BKK','KEJ'] or Segments[0].Origin in ['BKK','BQS'] and Segments[0].Destination in ['BKK','BQS'] or Segments[0].Origin in ['DXB','IKT'] and Segments[0].Destination in ['DXB','IKT'] or Segments[0].Origin in ['SSH','TJM'] and Segments[0].Destination in ['SSH','TJM'] or Segments[0].Origin in ['PUJ','ROV'] and Segments[0].Destination in ['PUJ','ROV'] or Segments[0].Origin in ['AER','SVX'] and Segments[0].Destination in ['AER','SVX'] or Segments[0].Origin in ['UFA','ETH'] and Segments[0].Destination in ['UFA','ETH'] or Segments[0].Origin in ['BKK','KUF'] and Segments[0].Destination in ['BKK','KUF'] or Segments[0].Origin in ['BKK','VVO'] and Segments[0].Destination in ['BKK','VVO'] or Segments[0].Origin in ['HKT','OVB'] and Segments[0].Destination in ['HKT','OVB'] or Segments[0].Origin in ['ZTH','LED'] and Segments[0].Destination in ['ZTH','LED'] or Segments[0].Origin in ['KZN','NHA'] and Segments[0].Destination in ['KZN','NHA'] or Segments[0].Origin in ['VRA','BAX'] and Segments[0].Destination in ['VRA','BAX'] or Segments[0].Origin in ['RTW','NHA'] and Segments[0].Destination in ['RTW','NHA'] or Segments[0].Origin in ['SKG','DNK'] and Segments[0].Destination in ['SKG','DNK'] or Segments[0].Origin in ['SGN','VOG'] and Segments[0].Destination in ['SGN','VOG'] or Segments[0].Origin in ['KBV','VVO'] and Segments[0].Destination in ['KBV','VVO'] or Segments[0].Origin in ['IEV','CFU'] and Segments[0].Destination in ['IEV','CFU'] or Segments[0].Origin in ['PUJ','TOF'] and Segments[0].Destination in ['PUJ','TOF'] or Segments[0].Origin in ['HKT','KEJ'] and Segments[0].Destination in ['HKT','KEJ'] or Segments[0].Origin in ['PUJ','NJC'] and Segments[0].Destination in ['PUJ','NJC'] or Segments[0].Origin in ['PEE','CUN'] and Segments[0].Destination in ['PEE','CUN'] or Segments[0].Origin in ['HKT','TJM'] and Segments[0].Destination in ['HKT','TJM'] or Segments[0].Origin in ['ETH','KZN'] and Segments[0].Destination in ['ETH','KZN'] or Segments[0].Origin in ['MCX','CUN'] and Segments[0].Destination in ['MCX','CUN'] or Segments[0].Origin in ['HRG','KUF'] and Segments[0].Destination in ['HRG','KUF'] or Segments[0].Origin in ['VRA','VOG'] and Segments[0].Destination in ['VRA','VOG'] or Segments[0].Origin in ['SVX','CUN'] and Segments[0].Destination in ['SVX','CUN'] or Segments[0].Origin in ['VRA','EGO'] and Segments[0].Destination in ['VRA','EGO'] or Segments[0].Origin in ['ROV','CUN'] and Segments[0].Destination in ['ROV','CUN'] or Segments[0].Origin in ['KJA','VRA'] and Segments[0].Destination in ['KJA','VRA'] or Segments[0].Origin in ['VRA','PEE'] and Segments[0].Destination in ['VRA','PEE'] or Segments[0].Origin in ['MOW','SKD'] and Segments[0].Destination in ['MOW','SKD'] or Segments[0].Origin in ['POP','ROV'] and Segments[0].Destination in ['POP','ROV'] or Segments[0].Origin in ['AYT','KZN'] and Segments[0].Destination in ['AYT','KZN'] or Segments[0].Origin in ['ETH','REN'] and Segments[0].Destination in ['ETH','REN'] or Segments[0].Origin in ['ETH','LED'] and Segments[0].Destination in ['ETH','LED'] or Segments[0].Origin in ['CEK','ETH'] and Segments[0].Destination in ['CEK','ETH'] or Segments[0].Origin in ['NHA','VOZ'] and Segments[0].Destination in ['NHA','VOZ'] or Segments[0].Origin in ['SVX','AER'] and Segments[0].Destination in ['SVX','AER'] or Segments[0].Origin in ['FEG','MOW'] and Segments[0].Destination in ['FEG','MOW'] or Segments[0].Origin in ['VRA','KZN'] and Segments[0].Destination in ['VRA','KZN'] or Segments[0].Origin in ['USM','PEE'] and Segments[0].Destination in ['USM','PEE'] or Segments[0].Origin in ['VVO','MOW'] and Segments[0].Destination in ['VVO','MOW'] or Segments[0].Origin in ['SGN','KEJ'] and Segments[0].Destination in ['SGN','KEJ'] or Segments[0].Origin in ['DXB','AER'] and Segments[0].Destination in ['DXB','AER'] or Segments[0].Origin in ['MOW','VOG'] and Segments[0].Destination in ['MOW','VOG'] or Segments[0].Origin in ['SGN','YKS'] and Segments[0].Destination in ['SGN','YKS'] or Segments[0].Origin in ['VRA','NJC'] and Segments[0].Destination in ['VRA','NJC'] or Segments[0].Origin in ['VOG','PUJ'] and Segments[0].Destination in ['VOG','PUJ'] or Segments[0].Origin in ['HKT','MOW'] and Segments[0].Destination in ['HKT','MOW'] or Segments[0].Origin in ['VOG','SKG'] and Segments[0].Destination in ['VOG','SKG'] or Segments[0].Origin in ['OVB','YKS'] and Segments[0].Destination in ['OVB','YKS'] or Segments[0].Origin in ['SGC','SSH'] and Segments[0].Destination in ['SGC','SSH'] or Segments[0].Origin in ['VOZ','NHA'] and Segments[0].Destination in ['VOZ','NHA'] or Segments[0].Origin in ['CUN','NBC'] and Segments[0].Destination in ['CUN','NBC'] or Segments[0].Origin in ['KZN','SSH'] and Segments[0].Destination in ['KZN','SSH'] or Segments[0].Origin in ['HER','MOW'] and Segments[0].Destination in ['HER','MOW'] or Segments[0].Origin in ['TDX','UFA'] and Segments[0].Destination in ['TDX','UFA'] or Segments[0].Origin in ['KZN','ETH'] and Segments[0].Destination in ['KZN','ETH'] or Segments[0].Origin in ['ABA','CUN'] and Segments[0].Destination in ['ABA','CUN'] or Segments[0].Origin in ['PEE','NHA'] and Segments[0].Destination in ['PEE','NHA'] or Segments[0].Origin in ['CUN','TOF'] and Segments[0].Destination in ['CUN','TOF'] or Segments[0].Origin in ['TJM','HRG'] and Segments[0].Destination in ['TJM','HRG'] or Segments[0].Origin in ['EGO','HRG'] and Segments[0].Destination in ['EGO','HRG'] or Segments[0].Origin in ['GOJ','SSH'] and Segments[0].Destination in ['GOJ','SSH'] or Segments[0].Origin in ['HKT','HTA'] and Segments[0].Destination in ['HKT','HTA'] or Segments[0].Origin in ['MOW','ETH'] and Segments[0].Destination in ['MOW','ETH'] or Segments[0].Origin in ['OGZ','VRA'] and Segments[0].Destination in ['OGZ','VRA'] or Segments[0].Origin in ['HKT','NBC'] and Segments[0].Destination in ['HKT','NBC'] or Segments[0].Origin in ['GPA','MSQ'] and Segments[0].Destination in ['GPA','MSQ'] or Segments[0].Origin in ['SGN','TOF'] and Segments[0].Destination in ['SGN','TOF'] or Segments[0].Origin in ['HKT','MCX'] and Segments[0].Destination in ['HKT','MCX'] or Segments[0].Origin in ['KRR','VRA'] and Segments[0].Destination in ['KRR','VRA'] or Segments[0].Origin in ['ROV','PUJ'] and Segments[0].Destination in ['ROV','PUJ'] or Segments[0].Origin in ['CEE','VRA'] and Segments[0].Destination in ['CEE','VRA'] or Segments[0].Origin in ['TJM','NHA'] and Segments[0].Destination in ['TJM','NHA'] or Segments[0].Origin in ['RTW','CUN'] and Segments[0].Destination in ['RTW','CUN'] or Segments[0].Origin in ['AER','KZN'] and Segments[0].Destination in ['AER','KZN'] or Segments[0].Origin in ['MRV','ETH'] and Segments[0].Destination in ['MRV','ETH'] or Segments[0].Origin in ['SGN','VOZ'] and Segments[0].Destination in ['SGN','VOZ'] or Segments[0].Origin in ['USM','BQS'] and Segments[0].Destination in ['USM','BQS'] or Segments[0].Origin in ['USM','SGC'] and Segments[0].Destination in ['USM','SGC'] or Segments[0].Origin in ['HER','SVX'] and Segments[0].Destination in ['HER','SVX'] or Segments[0].Origin in ['DXB','KZN'] and Segments[0].Destination in ['DXB','KZN'] or Segments[0].Origin in ['TDX','KEJ'] and Segments[0].Destination in ['TDX','KEJ'] or Segments[0].Origin in ['HRG','SGC'] and Segments[0].Destination in ['HRG','SGC'] or Segments[0].Origin in ['SOF','LED'] and Segments[0].Destination in ['SOF','LED'] or Segments[0].Origin in ['DXB','UFA'] and Segments[0].Destination in ['DXB','UFA'] or Segments[0].Origin in ['EVN','MOW'] and Segments[0].Destination in ['EVN','MOW'] or Segments[0].Origin in ['HKT','LED'] and Segments[0].Destination in ['HKT','LED'] or Segments[0].Origin in ['SGN','NJC'] and Segments[0].Destination in ['SGN','NJC'] or Segments[0].Origin in ['SHJ','KUF'] and Segments[0].Destination in ['SHJ','KUF'] or Segments[0].Origin in ['AQJ','LED'] and Segments[0].Destination in ['AQJ','LED'] or Segments[0].Origin in ['HRG','GOJ'] and Segments[0].Destination in ['HRG','GOJ'] or Segments[0].Origin in ['PRG','LED'] and Segments[0].Destination in ['PRG','LED'] or Segments[0].Origin in ['NOZ','NHA'] and Segments[0].Destination in ['NOZ','NHA'] or Segments[0].Origin in ['ARH','SSH'] and Segments[0].Destination in ['ARH','SSH'] or Segments[0].Origin in ['SSH','REN'] and Segments[0].Destination in ['SSH','REN'] or Segments[0].Origin in ['AYT','GOJ'] and Segments[0].Destination in ['AYT','GOJ'] or Segments[0].Origin in ['ATH','MSQ'] and Segments[0].Destination in ['ATH','MSQ'] or Segments[0].Origin in ['MOW','VAR'] and Segments[0].Destination in ['MOW','VAR'] or Segments[0].Origin in ['HER','LED'] and Segments[0].Destination in ['HER','LED'] or Segments[0].Origin in ['SIP','KJA'] and Segments[0].Destination in ['SIP','KJA'] or Segments[0].Origin in ['TJM','CUN'] and Segments[0].Destination in ['TJM','CUN'] or Segments[0].Origin in ['PUJ','LED'] and Segments[0].Destination in ['PUJ','LED'] or Segments[0].Origin in ['BKK','SGC'] and Segments[0].Destination in ['BKK','SGC'] or Segments[0].Origin in ['PUJ','KEJ'] and Segments[0].Destination in ['PUJ','KEJ'] or Segments[0].Origin in ['BKK','KJA'] and Segments[0].Destination in ['BKK','KJA'] or Segments[0].Origin in ['DXB','VOG'] and Segments[0].Destination in ['DXB','VOG'] or Segments[0].Origin in ['PUJ','KJA'] and Segments[0].Destination in ['PUJ','KJA'] or Segments[0].Origin in ['RMI','MOW'] and Segments[0].Destination in ['RMI','MOW'] or Segments[0].Origin in ['USM','KEJ'] and Segments[0].Destination in ['USM','KEJ'] or Segments[0].Origin in ['MOW','RVN'] and Segments[0].Destination in ['MOW','RVN'] or Segments[0].Origin in ['VRA','AER'] and Segments[0].Destination in ['VRA','AER'] or Segments[0].Origin in ['SGN','VVO'] and Segments[0].Destination in ['SGN','VVO'] or Segments[0].Origin in ['SIP','MOW'] and Segments[0].Destination in ['SIP','MOW'] or Segments[0].Origin in ['ETH','MRV'] and Segments[0].Destination in ['ETH','MRV'] or Segments[0].Origin in ['VRA','MRV'] and Segments[0].Destination in ['VRA','MRV'] or Segments[0].Origin in ['ROV','MOW'] and Segments[0].Destination in ['ROV','MOW'] or Segments[0].Origin in ['KBV','TJM'] and Segments[0].Destination in ['KBV','TJM'] or Segments[0].Origin in ['PUJ','VOZ'] and Segments[0].Destination in ['PUJ','VOZ'] or Segments[0].Origin in ['LED','AER'] and Segments[0].Destination in ['LED','AER'] or Segments[0].Origin in ['AER','VRA'] and Segments[0].Destination in ['AER','VRA'] or Segments[0].Origin in ['CUN','SVX'] and Segments[0].Destination in ['CUN','SVX'] or Segments[0].Origin in ['HKT','ROV'] and Segments[0].Destination in ['HKT','ROV'] or Segments[0].Origin in ['KUF','NHA'] and Segments[0].Destination in ['KUF','NHA'] or Segments[0].Origin in ['KGD','SKG'] and Segments[0].Destination in ['KGD','SKG'] or Segments[0].Origin in ['DXB','YKS'] and Segments[0].Destination in ['DXB','YKS'] or Segments[0].Origin in ['AER','PEE'] and Segments[0].Destination in ['AER','PEE'] or Segments[0].Origin in ['ROV','CFU'] and Segments[0].Destination in ['ROV','CFU'] or Segments[0].Origin in ['VOG','CUN'] and Segments[0].Destination in ['VOG','CUN'] or Segments[0].Origin in ['PUJ','KZN'] and Segments[0].Destination in ['PUJ','KZN'] or Segments[0].Origin in ['MOW','SZG'] and Segments[0].Destination in ['MOW','SZG'] or Segments[0].Origin in ['GDX','MOW'] and Segments[0].Destination in ['GDX','MOW'] or Segments[0].Origin in ['HKT','VOG'] and Segments[0].Destination in ['HKT','VOG'] or Segments[0].Origin in ['BOJ','MOW'] and Segments[0].Destination in ['BOJ','MOW'] or Segments[0].Origin in ['OVB','HTA'] and Segments[0].Destination in ['OVB','HTA'] or Segments[0].Origin in ['BKK','EGO'] and Segments[0].Destination in ['BKK','EGO'] or Segments[0].Origin in ['ETH','KUF'] and Segments[0].Destination in ['ETH','KUF'] or Segments[0].Origin in ['HRG','ARH'] and Segments[0].Destination in ['HRG','ARH'] or Segments[0].Origin in ['MOW','KGD'] and Segments[0].Destination in ['MOW','KGD'] or Segments[0].Origin in ['HRG','CEK'] and Segments[0].Destination in ['HRG','CEK'] or Segments[0].Origin in ['LED','HER'] and Segments[0].Destination in ['LED','HER'] or Segments[0].Origin in ['USM','IKT'] and Segments[0].Destination in ['USM','IKT'] or Segments[0].Origin in ['CUN','TJM'] and Segments[0].Destination in ['CUN','TJM'] or Segments[0].Origin in ['NHA','UUS'] and Segments[0].Destination in ['NHA','UUS'] or Segments[0].Origin in ['NHA','KZN'] and Segments[0].Destination in ['NHA','KZN'] or Segments[0].Origin in ['NBC','HRG'] and Segments[0].Destination in ['NBC','HRG'] or Segments[0].Origin in ['SKG','SVX'] and Segments[0].Destination in ['SKG','SVX'] or Segments[0].Origin in ['HRG','UFA'] and Segments[0].Destination in ['HRG','UFA'] or Segments[0].Origin in ['TDX','MOW'] and Segments[0].Destination in ['TDX','MOW'] or Segments[0].Origin in ['LED','SKG'] and Segments[0].Destination in ['LED','SKG'] or Segments[0].Origin in ['SGN','SVX'] and Segments[0].Destination in ['SGN','SVX'] or Segments[0].Origin in ['CUN','AER'] and Segments[0].Destination in ['CUN','AER'] or Segments[0].Origin in ['MOW','KUT'] and Segments[0].Destination in ['MOW','KUT'] or Segments[0].Origin in ['VRN','KRR'] and Segments[0].Destination in ['VRN','KRR'] or Segments[0].Origin in ['MSQ','ATH'] and Segments[0].Destination in ['MSQ','ATH'] or Segments[0].Origin in ['PUJ','BAX'] and Segments[0].Destination in ['PUJ','BAX'] or Segments[0].Origin in ['KEJ','CUN'] and Segments[0].Destination in ['KEJ','CUN'] or Segments[0].Origin in ['KUF','PUJ'] and Segments[0].Destination in ['KUF','PUJ'] or Segments[0].Origin in ['VRA','KUF'] and Segments[0].Destination in ['VRA','KUF'] or Segments[0].Origin in ['LED','HRG'] and Segments[0].Destination in ['LED','HRG'] or Segments[0].Origin in ['BKK','ASF'] and Segments[0].Destination in ['BKK','ASF'] or Segments[0].Origin in ['IEV','HER'] and Segments[0].Destination in ['IEV','HER'] or Segments[0].Origin in ['SHJ','ROV'] and Segments[0].Destination in ['SHJ','ROV'] or Segments[0].Origin in ['KUT','MOW'] and Segments[0].Destination in ['KUT','MOW'] or Segments[0].Origin in ['HKT','KRR'] and Segments[0].Destination in ['HKT','KRR'] or Segments[0].Origin in ['AYT','MOW'] and Segments[0].Destination in ['AYT','MOW'] or Segments[0].Origin in ['VRA','MOW'] and Segments[0].Destination in ['VRA','MOW'] or Segments[0].Origin in ['SCW','PUJ'] and Segments[0].Destination in ['SCW','PUJ'] or Segments[0].Origin in ['MOW','TAS'] and Segments[0].Destination in ['MOW','TAS'] or Segments[0].Origin in ['IEV','SKG'] and Segments[0].Destination in ['IEV','SKG'] or Segments[0].Origin in ['LED','BOJ'] and Segments[0].Destination in ['LED','BOJ'] or Segments[0].Origin in ['HKT','SVX'] and Segments[0].Destination in ['HKT','SVX'] or Segments[0].Origin in ['BKK','SVX'] and Segments[0].Destination in ['BKK','SVX'] or Segments[0].Origin in ['SGN','MOW'] and Segments[0].Destination in ['SGN','MOW'] or Segments[0].Origin in ['SVX','ETH'] and Segments[0].Destination in ['SVX','ETH'] or Segments[0].Origin in ['SSH','PEE'] and Segments[0].Destination in ['SSH','PEE'] or Segments[0].Origin in ['NHA','KUF'] and Segments[0].Destination in ['NHA','KUF'] or Segments[0].Origin in ['SSH','KUF'] and Segments[0].Destination in ['SSH','KUF'] or Segments[0].Origin in ['DXB','MOW'] and Segments[0].Destination in ['DXB','MOW'] or Segments[0].Origin in ['PUJ','YKS'] and Segments[0].Destination in ['PUJ','YKS'] or Segments[0].Origin in ['SSH','ARH'] and Segments[0].Destination in ['SSH','ARH'] or Segments[0].Origin in ['AUH','MOW'] and Segments[0].Destination in ['AUH','MOW'] or Segments[0].Origin in ['UTP','IKT'] and Segments[0].Destination in ['UTP','IKT'] or Segments[0].Origin in ['KRR','SSH'] and Segments[0].Destination in ['KRR','SSH'] or Segments[0].Origin in ['HRG','KZN'] and Segments[0].Destination in ['HRG','KZN'] or Segments[0].Origin in ['BKK','ROV'] and Segments[0].Destination in ['BKK','ROV'] or Segments[0].Origin in ['CEK','PUJ'] and Segments[0].Destination in ['CEK','PUJ'] or Segments[0].Origin in ['SGN','KGD'] and Segments[0].Destination in ['SGN','KGD'] or Segments[0].Origin in ['KEJ','PUJ'] and Segments[0].Destination in ['KEJ','PUJ'] or Segments[0].Origin in ['HKT','SCW'] and Segments[0].Destination in ['HKT','SCW'] or Segments[0].Origin in ['BKK','KGD'] and Segments[0].Destination in ['BKK','KGD'] or Segments[0].Origin in ['HKT','SGC'] and Segments[0].Destination in ['HKT','SGC'] or Segments[0].Origin in ['REN','HRG'] and Segments[0].Destination in ['REN','HRG'] or Segments[0].Origin in ['SKG','TSE'] and Segments[0].Destination in ['SKG','TSE'] or Segments[0].Origin in ['BKK','PKC'] and Segments[0].Destination in ['BKK','PKC'] or Segments[0].Origin in ['VRA','KJA'] and Segments[0].Destination in ['VRA','KJA'] or Segments[0].Origin in ['SCW','CUN'] and Segments[0].Destination in ['SCW','CUN'] or Segments[0].Origin in ['SKG','KZN'] and Segments[0].Destination in ['SKG','KZN'] or Segments[0].Origin in ['MOW','GRV'] and Segments[0].Destination in ['MOW','GRV'] or Segments[0].Origin in ['HRG','NBC'] and Segments[0].Destination in ['HRG','NBC'] or Segments[0].Origin in ['SCW','VRA'] and Segments[0].Destination in ['SCW','VRA'] or Segments[0].Origin in ['UFA','HRG'] and Segments[0].Destination in ['UFA','HRG'] or Segments[0].Origin in ['EGO','CUN'] and Segments[0].Destination in ['EGO','CUN'] or Segments[0].Origin in ['KUF','HRG'] and Segments[0].Destination in ['KUF','HRG'] or Segments[0].Origin in ['CUN','ROV'] and Segments[0].Destination in ['CUN','ROV'] or Segments[0].Origin in ['KBV','KEJ'] and Segments[0].Destination in ['KBV','KEJ'] or Segments[0].Origin in ['NHA','IKT'] and Segments[0].Destination in ['NHA','IKT'] or Segments[0].Origin in ['SSH','KRR'] and Segments[0].Destination in ['SSH','KRR'] or Segments[0].Origin in ['CFU','MOW'] and Segments[0].Destination in ['CFU','MOW'] or Segments[0].Origin in ['MSQ','GPA'] and Segments[0].Destination in ['MSQ','GPA'] or Segments[0].Origin in ['ZTH','MOW'] and Segments[0].Destination in ['ZTH','MOW'] or Segments[0].Origin in ['AER','KJA'] and Segments[0].Destination in ['AER','KJA'] or Segments[0].Origin in ['MOW','CFU'] and Segments[0].Destination in ['MOW','CFU'] or Segments[0].Origin in ['BKK','SCW'] and Segments[0].Destination in ['BKK','SCW'] or Segments[0].Origin in ['PUJ','OGZ'] and Segments[0].Destination in ['PUJ','OGZ'] or Segments[0].Origin in ['AMM','MOW'] and Segments[0].Destination in ['AMM','MOW'] or Segments[0].Origin in ['OVB','TOF'] and Segments[0].Destination in ['OVB','TOF'] or Segments[0].Origin in ['SGN','KZN'] and Segments[0].Destination in ['SGN','KZN'] or Segments[0].Origin in ['VOG','AER'] and Segments[0].Destination in ['VOG','AER'] or Segments[0].Origin in ['VRA','SVX'] and Segments[0].Destination in ['VRA','SVX'] or Segments[0].Origin in ['DXB','SVX'] and Segments[0].Destination in ['DXB','SVX'] or Segments[0].Origin in ['HKT','BQS'] and Segments[0].Destination in ['HKT','BQS'] or Segments[0].Origin in ['PUJ','EGO'] and Segments[0].Destination in ['PUJ','EGO'] or Segments[0].Origin in ['DXB','LED'] and Segments[0].Destination in ['DXB','LED'] or Segments[0].Origin in ['ETH','MOW'] and Segments[0].Destination in ['ETH','MOW'] or Segments[0].Origin in ['MOW','KJA'] and Segments[0].Destination in ['MOW','KJA'] or Segments[0].Origin in ['IKT','MOW'] and Segments[0].Destination in ['IKT','MOW'] or Segments[0].Origin in ['KBV','ROV'] and Segments[0].Destination in ['KBV','ROV'] or Segments[0].Origin in ['BKK','REN'] and Segments[0].Destination in ['BKK','REN'] or Segments[0].Origin in ['HKT','PEE'] and Segments[0].Destination in ['HKT','PEE'] or Segments[0].Origin in ['SVX','VRA'] and Segments[0].Destination in ['SVX','VRA'] or Segments[0].Origin in ['BKK','AER'] and Segments[0].Destination in ['BKK','AER'] or Segments[0].Origin in ['ETH','ROV'] and Segments[0].Destination in ['ETH','ROV'] or Segments[0].Origin in ['SGN','SCW'] and Segments[0].Destination in ['SGN','SCW'] or Segments[0].Origin in ['SIP','KUF'] and Segments[0].Destination in ['SIP','KUF'] or Segments[0].Origin in ['CEK','NHA'] and Segments[0].Destination in ['CEK','NHA'] or Segments[0].Origin in ['AQJ','KRR'] and Segments[0].Destination in ['AQJ','KRR'] or Segments[0].Origin in ['KBV','MOW'] and Segments[0].Destination in ['KBV','MOW'] or Segments[0].Origin in ['BHK','MOW'] and Segments[0].Destination in ['BHK','MOW'] or Segments[0].Origin in ['BKK','PEE'] and Segments[0].Destination in ['BKK','PEE'] or Segments[0].Origin in ['MOW','BAX'] and Segments[0].Destination in ['MOW','BAX'] or Segments[0].Origin in ['GPA','MOW'] and Segments[0].Destination in ['GPA','MOW'] or Segments[0].Origin in ['RIX','MOW'] and Segments[0].Destination in ['RIX','MOW'] or Segments[0].Origin in ['DXB','NBC'] and Segments[0].Destination in ['DXB','NBC'] or Segments[0].Origin in ['PUJ','OVB'] and Segments[0].Destination in ['PUJ','OVB'] or Segments[0].Origin in ['ETH','CEK'] and Segments[0].Destination in ['ETH','CEK'] or Segments[0].Origin in ['KRR','ETH'] and Segments[0].Destination in ['KRR','ETH'] or Segments[0].Origin in ['HKT','UUD'] and Segments[0].Destination in ['HKT','UUD'] or Segments[0].Origin in ['TOF','VRA'] and Segments[0].Destination in ['TOF','VRA'] or Segments[0].Origin in ['MOW','SKG'] and Segments[0].Destination in ['MOW','SKG'] or Segments[0].Origin in ['BTK','OVB'] and Segments[0].Destination in ['BTK','OVB'] or Segments[0].Origin in ['KRR','LCA'] and Segments[0].Destination in ['KRR','LCA'] or Segments[0].Origin in ['OGZ','CUN'] and Segments[0].Destination in ['OGZ','CUN'] or Segments[0].Origin in ['PUJ','KGD'] and Segments[0].Destination in ['PUJ','KGD'] or Segments[0].Origin in ['USM','OVB'] and Segments[0].Destination in ['USM','OVB'] or Segments[0].Origin in ['MOW','SHE'] and Segments[0].Destination in ['MOW','SHE'] or Segments[0].Origin in ['RTW','VRA'] and Segments[0].Destination in ['RTW','VRA'] or Segments[0].Origin in ['SHJ','VOZ'] and Segments[0].Destination in ['SHJ','VOZ'] or Segments[0].Origin in ['SSH','VOG'] and Segments[0].Destination in ['SSH','VOG'] or Segments[0].Origin in ['DXB','NOZ'] and Segments[0].Destination in ['DXB','NOZ'] or Segments[0].Origin in ['SGN','SGC'] and Segments[0].Destination in ['SGN','SGC'] or Segments[0].Origin in ['VVO','NHA'] and Segments[0].Destination in ['VVO','NHA'] or Segments[0].Origin in ['CUN','KZN'] and Segments[0].Destination in ['CUN','KZN'] or Segments[0].Origin in ['AYT','SVX'] and Segments[0].Destination in ['AYT','SVX'] or Segments[0].Origin in ['CUN','KGD'] and Segments[0].Destination in ['CUN','KGD'] or Segments[0].Origin in ['KBV','KZN'] and Segments[0].Destination in ['KBV','KZN'] or Segments[0].Origin in ['VRN','MOW'] and Segments[0].Destination in ['VRN','MOW'] or Segments[0].Origin in ['OVB','UUD'] and Segments[0].Destination in ['OVB','UUD'] or Segments[0].Origin in ['USM','TJM'] and Segments[0].Destination in ['USM','TJM'] or Segments[0].Origin in ['HRG','MMK'] and Segments[0].Destination in ['HRG','MMK'] or Segments[0].Origin in ['KUF','SSH'] and Segments[0].Destination in ['KUF','SSH'] or Segments[0].Origin in ['AER','LED'] and Segments[0].Destination in ['AER','LED'] or Segments[0].Origin in ['SGN','ROV'] and Segments[0].Destination in ['SGN','ROV'] or Segments[0].Origin in ['KZN','CUN'] and Segments[0].Destination in ['KZN','CUN'] or Segments[0].Origin in ['VRA','NBC'] and Segments[0].Destination in ['VRA','NBC'] or Segments[0].Origin in ['KUF','CUN'] and Segments[0].Destination in ['KUF','CUN'] or Segments[0].Origin in ['SSH','SGC'] and Segments[0].Destination in ['SSH','SGC'] or Segments[0].Origin in ['VRA','OVB'] and Segments[0].Destination in ['VRA','OVB'] or Segments[0].Origin in ['ODS','SKG'] and Segments[0].Destination in ['ODS','SKG'] or Segments[0].Origin in ['AMM','LED'] and Segments[0].Destination in ['AMM','LED'] or Segments[0].Origin in ['RTW','PUJ'] and Segments[0].Destination in ['RTW','PUJ'] or Segments[0].Origin in ['BKK','NJC'] and Segments[0].Destination in ['BKK','NJC'] or Segments[0].Origin in ['CUN','KRR'] and Segments[0].Destination in ['CUN','KRR'] or Segments[0].Origin in ['MRV','SSH'] and Segments[0].Destination in ['MRV','SSH'] or Segments[0].Origin in ['SGC','HRG'] and Segments[0].Destination in ['SGC','HRG'] or Segments[0].Origin in ['KZN','SKG'] and Segments[0].Destination in ['KZN','SKG'] or Segments[0].Origin in ['UFA','MOW'] and Segments[0].Destination in ['UFA','MOW'] or Segments[0].Origin in ['ROM','MOW'] and Segments[0].Destination in ['ROM','MOW'] or Segments[0].Origin in ['NBC','PUJ'] and Segments[0].Destination in ['NBC','PUJ'] or Segments[0].Origin in ['KHV','MOW'] and Segments[0].Destination in ['KHV','MOW'] or Segments[0].Origin in ['VRA','CEK'] and Segments[0].Destination in ['VRA','CEK'] or Segments[0].Origin in ['VRA','KEJ'] and Segments[0].Destination in ['VRA','KEJ'] or Segments[0].Origin in ['MOW','VVO'] and Segments[0].Destination in ['MOW','VVO'] or Segments[0].Origin in ['TOF','CUN'] and Segments[0].Destination in ['TOF','CUN'] or Segments[0].Origin in ['OVB','SKG'] and Segments[0].Destination in ['OVB','SKG'] or Segments[0].Origin in ['CUN','VOG'] and Segments[0].Destination in ['CUN','VOG'] or Segments[0].Origin in ['BKK','VOZ'] and Segments[0].Destination in ['BKK','VOZ'] or Segments[0].Origin in ['ROV','ETH'] and Segments[0].Destination in ['ROV','ETH'] or Segments[0].Origin in ['HTA','NHA'] and Segments[0].Destination in ['HTA','NHA'] or Segments[0].Origin in ['GOJ','VRA'] and Segments[0].Destination in ['GOJ','VRA'] or Segments[0].Origin in ['MOW','VRN'] and Segments[0].Destination in ['MOW','VRN'] or Segments[0].Origin in ['KZN','HRG'] and Segments[0].Destination in ['KZN','HRG'] or Segments[0].Origin in ['NHA','BAX'] and Segments[0].Destination in ['NHA','BAX'] or Segments[0].Origin in ['VRA','ASF'] and Segments[0].Destination in ['VRA','ASF'] or Segments[0].Origin in ['GOJ','SKG'] and Segments[0].Destination in ['GOJ','SKG'] or Segments[0].Origin in ['SKG','LWO'] and Segments[0].Destination in ['SKG','LWO'] or Segments[0].Origin in ['MRV','CUN'] and Segments[0].Destination in ['MRV','CUN'] or Segments[0].Origin in ['SOF','MOW'] and Segments[0].Destination in ['SOF','MOW'] or Segments[0].Origin in ['BAX','VRA'] and Segments[0].Destination in ['BAX','VRA'] or Segments[0].Origin in ['SSH','MRV'] and Segments[0].Destination in ['SSH','MRV'] or Segments[0].Origin in ['KRR','LED'] and Segments[0].Destination in ['KRR','LED'] or Segments[0].Origin in ['NHA','REN'] and Segments[0].Destination in ['NHA','REN'] or Segments[0].Origin in ['ATH','MOW'] and Segments[0].Destination in ['ATH','MOW'] or Segments[0].Origin in ['KZN','VRA'] and Segments[0].Destination in ['KZN','VRA'] or Segments[0].Origin in ['HRG','VOZ'] and Segments[0].Destination in ['HRG','VOZ'] or Segments[0].Origin in ['SGN','KUF'] and Segments[0].Destination in ['SGN','KUF'] or Segments[0].Origin in ['LED','CFU'] and Segments[0].Destination in ['LED','CFU'] or Segments[0].Origin in ['SGN','MRV'] and Segments[0].Destination in ['SGN','MRV'] or Segments[0].Origin in ['CUN','EGO'] and Segments[0].Destination in ['CUN','EGO'] or Segments[0].Origin in ['KJA','AER'] and Segments[0].Destination in ['KJA','AER'] or Segments[0].Origin in ['VRA','SCW'] and Segments[0].Destination in ['VRA','SCW'] or Segments[0].Origin in ['BQS','NHA'] and Segments[0].Destination in ['BQS','NHA'] or Segments[0].Origin in ['KGD','SSH'] and Segments[0].Destination in ['KGD','SSH'] or Segments[0].Origin in ['BKK','KRR'] and Segments[0].Destination in ['BKK','KRR'] or Segments[0].Origin in ['DXB','OVB'] and Segments[0].Destination in ['DXB','OVB'] or Segments[0].Origin in ['KRR','HRG'] and Segments[0].Destination in ['KRR','HRG'] or Segments[0].Origin in ['VRA','OMS'] and Segments[0].Destination in ['VRA','OMS'] or Segments[0].Origin in ['BKK','MRV'] and Segments[0].Destination in ['BKK','MRV'] or Segments[0].Origin in ['IKT','PUJ'] and Segments[0].Destination in ['IKT','PUJ'] or Segments[0].Origin in ['KZN','PUJ'] and Segments[0].Destination in ['KZN','PUJ'] or Segments[0].Origin in ['BKK','LED'] and Segments[0].Destination in ['BKK','LED'] or Segments[0].Origin in ['SGN','LED'] and Segments[0].Destination in ['SGN','LED'] or Segments[0].Origin in ['NHA','CEK'] and Segments[0].Destination in ['NHA','CEK'] or Segments[0].Origin in ['KJA','SSH'] and Segments[0].Destination in ['KJA','SSH'] or Segments[0].Origin in ['CUN','MOW'] and Segments[0].Destination in ['CUN','MOW'] or Segments[0].Origin in ['UUD','NHA'] and Segments[0].Destination in ['UUD','NHA'] or Segments[0].Origin in ['KUF','ETH'] and Segments[0].Destination in ['KUF','ETH'] or Segments[0].Origin in ['HKT','REN'] and Segments[0].Destination in ['HKT','REN'] or Segments[0].Origin in ['BKK','MOW'] and Segments[0].Destination in ['BKK','MOW'] or Segments[0].Origin in ['BKK','UUD'] and Segments[0].Destination in ['BKK','UUD'] or Segments[0].Origin in ['CUN','OVB'] and Segments[0].Destination in ['CUN','OVB'] or Segments[0].Origin in ['SVX','SSH'] and Segments[0].Destination in ['SVX','SSH'] or Segments[0].Origin in ['LED','ETH'] and Segments[0].Destination in ['LED','ETH'] or Segments[0].Origin in ['MSQ','CFU'] and Segments[0].Destination in ['MSQ','CFU'] or Segments[0].Origin in ['KGD','PUJ'] and Segments[0].Destination in ['KGD','PUJ'] or Segments[0].Origin in ['OVB','AER'] and Segments[0].Destination in ['OVB','AER'] or Segments[0].Origin in ['OMS','NHA'] and Segments[0].Destination in ['OMS','NHA'] or Segments[0].Origin in ['PUJ','GOJ'] and Segments[0].Destination in ['PUJ','GOJ'] or Segments[0].Origin in ['NHA','TOF'] and Segments[0].Destination in ['NHA','TOF'] or Segments[0].Origin in ['TDX','BAX'] and Segments[0].Destination in ['TDX','BAX'] or Segments[0].Origin in ['UTP','KJA'] and Segments[0].Destination in ['UTP','KJA'] or Segments[0].Origin in ['BKK','KHV'] and Segments[0].Destination in ['BKK','KHV'] or Segments[0].Origin in ['NHA','BQS'] and Segments[0].Destination in ['NHA','BQS'] or Segments[0].Origin in ['CMF','MOW'] and Segments[0].Destination in ['CMF','MOW'] or Segments[0].Origin in ['BER','MOW'] and Segments[0].Destination in ['BER','MOW'] or Segments[0].Origin in ['SGN','KHV'] and Segments[0].Destination in ['SGN','KHV'] or Segments[0].Origin in ['DXB','NJC'] and Segments[0].Destination in ['DXB','NJC'] or Segments[0].Origin in ['IKT','VRA'] and Segments[0].Destination in ['IKT','VRA'] or Segments[0].Origin in ['TAS','MOW'] and Segments[0].Destination in ['TAS','MOW'] or Segments[0].Origin in ['GOJ','AYT'] and Segments[0].Destination in ['GOJ','AYT'] or Segments[0].Origin in ['VRA','GOJ'] and Segments[0].Destination in ['VRA','GOJ'] or Segments[0].Origin in ['MOW','BQS'] and Segments[0].Destination in ['MOW','BQS'] or Segments[0].Origin in ['NOZ','VRA'] and Segments[0].Destination in ['NOZ','VRA'] or Segments[0].Origin in ['PUJ','CEK'] and Segments[0].Destination in ['PUJ','CEK'] or Segments[0].Origin in ['USM','BAX'] and Segments[0].Destination in ['USM','BAX'] or Segments[0].Origin in ['ROV','VRN'] and Segments[0].Destination in ['ROV','VRN'] or Segments[0].Origin in ['OVB','CUN'] and Segments[0].Destination in ['OVB','CUN'] or Segments[0].Origin in ['OVB','MOW'] and Segments[0].Destination in ['OVB','MOW'] or Segments[0].Origin in ['SKG','ROV'] and Segments[0].Destination in ['SKG','ROV'] or Segments[0].Origin in ['MOW','BKK'] and Segments[0].Destination in ['MOW','BKK'] or Segments[0].Origin in ['BKK','IKT'] and Segments[0].Destination in ['BKK','IKT'] or Segments[0].Origin in ['TDX','SGC'] and Segments[0].Destination in ['TDX','SGC'] or Segments[0].Origin in ['ROV','VRA'] and Segments[0].Destination in ['ROV','VRA'] or Segments[0].Origin in ['BKK','TOF'] and Segments[0].Destination in ['BKK','TOF'] or Segments[0].Origin in ['CUN','MRV'] and Segments[0].Destination in ['CUN','MRV'] or Segments[0].Origin in ['ZTH','MSQ'] and Segments[0].Destination in ['ZTH','MSQ'] or Segments[0].Origin in ['MOW','CMF'] and Segments[0].Destination in ['MOW','CMF'] or Segments[0].Origin in ['CUN','PEE'] and Segments[0].Destination in ['CUN','PEE'] or Segments[0].Origin in ['CEK','HRG'] and Segments[0].Destination in ['CEK','HRG'] or Segments[0].Origin in ['HRG','KRR'] and Segments[0].Destination in ['HRG','KRR'] or Segments[0].Origin in ['VAR','LED'] and Segments[0].Destination in ['VAR','LED'] or Segments[0].Origin in ['NBC','SSH'] and Segments[0].Destination in ['NBC','SSH'] or Segments[0].Origin in ['PUJ','AER'] and Segments[0].Destination in ['PUJ','AER'] or Segments[0].Origin in ['SIP','SVX'] and Segments[0].Destination in ['SIP','SVX'] or Segments[0].Origin in ['ROV','NHA'] and Segments[0].Destination in ['ROV','NHA'] or Segments[0].Origin in ['CUN','IKT'] and Segments[0].Destination in ['CUN','IKT'] or Segments[0].Origin in ['OVB','VRA'] and Segments[0].Destination in ['OVB','VRA'] or Segments[0].Origin in ['MOW','OVB'] and Segments[0].Destination in ['MOW','OVB'] or Segments[0].Origin in ['UUD','OVB'] and Segments[0].Destination in ['UUD','OVB'] or Segments[0].Origin in ['KRR','OVB'] and Segments[0].Destination in ['KRR','OVB'] or Segments[0].Origin in ['TJM','PUJ'] and Segments[0].Destination in ['TJM','PUJ'] or Segments[0].Origin in ['PEE','HRG'] and Segments[0].Destination in ['PEE','HRG'] or Segments[0].Origin in ['KZN','AYT'] and Segments[0].Destination in ['KZN','AYT'] or Segments[0].Origin in ['GVA','MOW'] and Segments[0].Destination in ['GVA','MOW'] or Segments[0].Origin in ['CUN','OGZ'] and Segments[0].Destination in ['CUN','OGZ'] or Segments[0].Origin in ['MUC','MOW'] and Segments[0].Destination in ['MUC','MOW'] or Segments[0].Origin in ['VOZ','SSH'] and Segments[0].Destination in ['VOZ','SSH'] or Segments[0].Origin in ['AER','OVB'] and Segments[0].Destination in ['AER','OVB'] or Segments[0].Origin in ['HRG','KEJ'] and Segments[0].Destination in ['HRG','KEJ'] or Segments[0].Origin in ['TJM','VRA'] and Segments[0].Destination in ['TJM','VRA'] or Segments[0].Origin in ['HKT','BAX'] and Segments[0].Destination in ['HKT','BAX'] or Segments[0].Origin in ['KUF','AER'] and Segments[0].Destination in ['KUF','AER'] or Segments[0].Origin in ['SGN','HTA'] and Segments[0].Destination in ['SGN','HTA'] or Segments[0].Origin in ['SSH','UFA'] and Segments[0].Destination in ['SSH','UFA'] or Segments[0].Origin in ['SHJ','MOW'] and Segments[0].Destination in ['SHJ','MOW'] or Segments[0].Origin in ['SSH','KZN'] and Segments[0].Destination in ['SSH','KZN'] or Segments[0].Origin in ['SVX','PUJ'] and Segments[0].Destination in ['SVX','PUJ'] or Segments[0].Origin in ['PRG','MOW'] and Segments[0].Destination in ['PRG','MOW'] or Segments[0].Origin in ['VOZ','VRA'] and Segments[0].Destination in ['VOZ','VRA'] or Segments[0].Origin in ['AER','MOW'] and Segments[0].Destination in ['AER','MOW'] or Segments[0].Origin in ['SSH','OMS'] and Segments[0].Destination in ['SSH','OMS'] or Segments[0].Origin in ['SSH','SCW'] and Segments[0].Destination in ['SSH','SCW'] or Segments[0].Origin in ['CUN','MCX'] and Segments[0].Destination in ['CUN','MCX'] or Segments[0].Origin in ['MMK','HRG'] and Segments[0].Destination in ['MMK','HRG'] or Segments[0].Origin in ['LED','SOF'] and Segments[0].Destination in ['LED','SOF'] or Segments[0].Origin in ['KBV','UFA'] and Segments[0].Destination in ['KBV','UFA'] or Segments[0].Origin in ['DJE','MOW'] and Segments[0].Destination in ['DJE','MOW'] or Segments[0].Origin in ['NJC','VRA'] and Segments[0].Destination in ['NJC','VRA'] or Segments[0].Origin in ['YKS','NHA'] and Segments[0].Destination in ['YKS','NHA'] or Segments[0].Origin in ['SSH','MMK'] and Segments[0].Destination in ['SSH','MMK'] or Segments[0].Origin in ['PUJ','TJM'] and Segments[0].Destination in ['PUJ','TJM'] or Segments[0].Origin in ['TOF','NHA'] and Segments[0].Destination in ['TOF','NHA'] or Segments[0].Origin in ['SGN','PEE'] and Segments[0].Destination in ['SGN','PEE'] or Segments[0].Origin in ['NOZ','CUN'] and Segments[0].Destination in ['NOZ','CUN'] or Segments[0].Origin in ['PEE','PUJ'] and Segments[0].Destination in ['PEE','PUJ'] or Segments[0].Origin in ['SVX','NHA'] and Segments[0].Destination in ['SVX','NHA'] or Segments[0].Origin in ['ARH','NHA'] and Segments[0].Destination in ['ARH','NHA'] or Segments[0].Origin in ['SCW','NHA'] and Segments[0].Destination in ['SCW','NHA'] or Segments[0].Origin in ['KEJ','SSH'] and Segments[0].Destination in ['KEJ','SSH'] or Segments[0].Origin in ['AER','UFA'] and Segments[0].Destination in ['AER','UFA'] or Segments[0].Origin in ['NHA','MCX'] and Segments[0].Destination in ['NHA','MCX'] or Segments[0].Origin in ['CUN','LED'] and Segments[0].Destination in ['CUN','LED'] or Segments[0].Origin in ['MOW','FEG'] and Segments[0].Destination in ['MOW','FEG'] or Segments[0].Origin in ['MOW','SVX'] and Segments[0].Destination in ['MOW','SVX'] or Segments[0].Origin in ['KBV','SGC'] and Segments[0].Destination in ['KBV','SGC'] or Segments[0].Origin in ['VRA','KRR'] and Segments[0].Destination in ['VRA','KRR'] or Segments[0].Origin in ['SKG','KRR'] and Segments[0].Destination in ['SKG','KRR'] or Segments[0].Origin in ['NJC','PUJ'] and Segments[0].Destination in ['NJC','PUJ'] or Segments[0].Origin in ['MSQ','ZTH'] and Segments[0].Destination in ['MSQ','ZTH'] or Segments[0].Origin in ['SKG','VOG'] and Segments[0].Destination in ['SKG','VOG'] or Segments[0].Origin in ['KJA','CUN'] and Segments[0].Destination in ['KJA','CUN'] or Segments[0].Origin in ['DXB','GOJ'] and Segments[0].Destination in ['DXB','GOJ'] or Segments[0].Origin in ['SGN','BAX'] and Segments[0].Destination in ['SGN','BAX'] or Segments[0].Origin in ['KUF','AYT'] and Segments[0].Destination in ['KUF','AYT'] or Segments[0].Origin in ['ETH','KRR'] and Segments[0].Destination in ['ETH','KRR'] or Segments[0].Origin in ['IKT','NHA'] and Segments[0].Destination in ['IKT','NHA'] or Segments[0].Origin in ['ROV','HRG'] and Segments[0].Destination in ['ROV','HRG'] or Segments[0].Origin in ['PUJ','IKT'] and Segments[0].Destination in ['PUJ','IKT'] or Segments[0].Origin in ['TIV','MOW'] and Segments[0].Destination in ['TIV','MOW'] or Segments[0].Origin in ['PUJ','MOW'] and Segments[0].Destination in ['PUJ','MOW'] or Segments[0].Origin in ['CEK','VRA'] and Segments[0].Destination in ['CEK','VRA'] or Segments[0].Origin in ['EGO','PUJ'] and Segments[0].Destination in ['EGO','PUJ'] or Segments[0].Origin in ['TDX','IKT'] and Segments[0].Destination in ['TDX','IKT'] or Segments[0].Origin in ['SKG','KGD'] and Segments[0].Destination in ['SKG','KGD'] or Segments[0].Origin in ['SGN','UFA'] and Segments[0].Destination in ['SGN','UFA'] or Segments[0].Origin in ['MOW','BOJ'] and Segments[0].Destination in ['MOW','BOJ'] or Segments[0].Origin in ['NHA','KRR'] and Segments[0].Destination in ['NHA','KRR'] or Segments[0].Origin in ['HKT','KHV'] and Segments[0].Destination in ['HKT','KHV'] or Segments[0].Origin in ['RIX','SKG'] and Segments[0].Destination in ['RIX','SKG'] or Segments[0].Origin in ['SIP','KRR'] and Segments[0].Destination in ['SIP','KRR'] or Segments[0].Origin in ['AAQ','VRA'] and Segments[0].Destination in ['AAQ','VRA'] or Segments[0].Origin in ['VOZ','HRG'] and Segments[0].Destination in ['VOZ','HRG'] or Segments[0].Origin in ['CFU','LED'] and Segments[0].Destination in ['CFU','LED'] or Segments[0].Origin in ['KBV','BQS'] and Segments[0].Destination in ['KBV','BQS'] or Segments[0].Origin in ['BKK','NBC'] and Segments[0].Destination in ['BKK','NBC'] or Segments[0].Origin in ['SSH','GOJ'] and Segments[0].Destination in ['SSH','GOJ'] or Segments[0].Origin in ['LED','OVB'] and Segments[0].Destination in ['LED','OVB'] or Segments[0].Origin in ['NHA','UUD'] and Segments[0].Destination in ['NHA','UUD'] or Segments[0].Origin in ['CUN','UFA'] and Segments[0].Destination in ['CUN','UFA'] or Segments[0].Origin in ['MMK','SSH'] and Segments[0].Destination in ['MMK','SSH'] or Segments[0].Origin in ['MOW','PKC'] and Segments[0].Destination in ['MOW','PKC'] or Segments[0].Origin in ['SKG','ODS'] and Segments[0].Destination in ['SKG','ODS'] or Segments[0].Origin in ['UFA','SKG'] and Segments[0].Destination in ['UFA','SKG'] or Segments[0].Origin in ['UFA','AER'] and Segments[0].Destination in ['UFA','AER'] or Segments[0].Origin in ['VRA','NOZ'] and Segments[0].Destination in ['VRA','NOZ'] or Segments[0].Origin in ['NHA','MOW'] and Segments[0].Destination in ['NHA','MOW'] or Segments[0].Origin in ['HKT','NOZ'] and Segments[0].Destination in ['HKT','NOZ'] or Segments[0].Origin in ['MCX','VRA'] and Segments[0].Destination in ['MCX','VRA'] or Segments[0].Origin in ['SIP','LED'] and Segments[0].Destination in ['SIP','LED'] or Segments[0].Origin in ['MOW','BGY'] and Segments[0].Destination in ['MOW','BGY'] or Segments[0].Origin in ['HKT','EGO'] and Segments[0].Destination in ['HKT','EGO'] or Segments[0].Origin in ['KZN','AER'] and Segments[0].Destination in ['KZN','AER'] or Segments[0].Origin in ['NHA','OVB'] and Segments[0].Destination in ['NHA','OVB'] or Segments[0].Origin in ['VRA','VOZ'] and Segments[0].Destination in ['VRA','VOZ'] or Segments[0].Origin in ['OVB','LED'] and Segments[0].Destination in ['OVB','LED'] or Segments[0].Origin in ['NBC','CUN'] and Segments[0].Destination in ['NBC','CUN'] or Segments[0].Origin in ['VRA','KGD'] and Segments[0].Destination in ['VRA','KGD'] or Segments[0].Origin in ['CUN','CEK'] and Segments[0].Destination in ['CUN','CEK'] or Segments[0].Origin in ['VOZ','CUN'] and Segments[0].Destination in ['VOZ','CUN'] or Segments[0].Origin in ['DYR','MOW'] and Segments[0].Destination in ['DYR','MOW'] or Segments[0].Origin in ['MOW','SOF'] and Segments[0].Destination in ['MOW','SOF'] or Segments[0].Origin in ['LED','PRG'] and Segments[0].Destination in ['LED','PRG'] or Segments[0].Origin in ['PKC','NHA'] and Segments[0].Destination in ['PKC','NHA'] or Segments[0].Origin in ['BKK','TJM'] and Segments[0].Destination in ['BKK','TJM'] or Segments[0].Origin in ['NHA','OMS'] and Segments[0].Destination in ['NHA','OMS'] or Segments[0].Origin in ['DXB','BAX'] and Segments[0].Destination in ['DXB','BAX'] or Segments[0].Origin in ['OVB','HRG'] and Segments[0].Destination in ['OVB','HRG'] or Segments[0].Origin in ['AYT','KUF'] and Segments[0].Destination in ['AYT','KUF'] or Segments[0].Origin in ['HKT','CEK'] and Segments[0].Destination in ['HKT','CEK'] or Segments[0].Origin in ['GRV','MOW'] and Segments[0].Destination in ['GRV','MOW'] or Segments[0].Origin in ['IEV','ATH'] and Segments[0].Destination in ['IEV','ATH'] or Segments[0].Origin in ['OGZ','NHA'] and Segments[0].Destination in ['OGZ','NHA'] or Segments[0].Origin in ['ROV','SSH'] and Segments[0].Destination in ['ROV','SSH'] or Segments[0].Origin in ['SKG','UFA'] and Segments[0].Destination in ['SKG','UFA'] or Segments[0].Origin in ['CUN','BAX'] and Segments[0].Destination in ['CUN','BAX'] or Segments[0].Origin in ['SZG','MOW'] and Segments[0].Destination in ['SZG','MOW'] or Segments[0].Origin in ['HKT','KGD'] and Segments[0].Destination in ['HKT','KGD'] or Segments[0].Origin in ['ROV','SKG'] and Segments[0].Destination in ['ROV','SKG'] or Segments[0].Origin in ['USM','SVX'] and Segments[0].Destination in ['USM','SVX'] or Segments[0].Origin in ['KBV','BAX'] and Segments[0].Destination in ['KBV','BAX'] or Segments[0].Origin in ['BQS','MOW'] and Segments[0].Destination in ['BQS','MOW'] or Segments[0].Origin in ['SSH','KEJ'] and Segments[0].Destination in ['SSH','KEJ'] or Segments[0].Origin in ['SIP','UFA'] and Segments[0].Destination in ['SIP','UFA'] or Segments[0].Origin in ['CUN','YKS'] and Segments[0].Destination in ['CUN','YKS'] or Segments[0].Origin in ['GOJ','NHA'] and Segments[0].Destination in ['GOJ','NHA'] or Segments[0].Origin in ['MOW','PUJ'] and Segments[0].Destination in ['MOW','PUJ'] or Segments[0].Origin in ['NHA','LED'] and Segments[0].Destination in ['NHA','LED'] or Segments[0].Origin in ['HKT','VOZ'] and Segments[0].Destination in ['HKT','VOZ'] or Segments[0].Origin in ['OMS','VRA'] and Segments[0].Destination in ['OMS','VRA'] or Segments[0].Origin in ['OVB','BQS'] and Segments[0].Destination in ['OVB','BQS'] or Segments[0].Origin in ['BKK','GOJ'] and Segments[0].Destination in ['BKK','GOJ'] or Segments[0].Origin in ['HKT','ASF'] and Segments[0].Destination in ['HKT','ASF'] or Segments[0].Origin in ['LED','PUJ'] and Segments[0].Destination in ['LED','PUJ'] or Segments[0].Origin in ['CUN','KUF'] and Segments[0].Destination in ['CUN','KUF'] or Segments[0].Origin in ['MOW','LCA'] and Segments[0].Destination in ['MOW','LCA'] or Segments[0].Origin in ['CUN','KEJ'] and Segments[0].Destination in ['CUN','KEJ'] or Segments[0].Origin in ['LWO','SKG'] and Segments[0].Destination in ['LWO','SKG'] or Segments[0].Origin in ['HRG','SVX'] and Segments[0].Destination in ['HRG','SVX'] or Segments[0].Origin in ['TCI','MOW'] and Segments[0].Destination in ['TCI','MOW'] or Segments[0].Origin in ['SIP','AER'] and Segments[0].Destination in ['SIP','AER'] or Segments[0].Origin in ['SGN','TJM'] and Segments[0].Destination in ['SGN','TJM'] or Segments[0].Origin in ['PUJ','VOG'] and Segments[0].Destination in ['PUJ','VOG'] or Segments[0].Origin in ['UFA','SSH'] and Segments[0].Destination in ['UFA','SSH'] or Segments[0].Origin in ['MIL','MOW'] and Segments[0].Destination in ['MIL','MOW'] or Segments[0].Origin in ['AER','PUJ'] and Segments[0].Destination in ['AER','PUJ'] or Segments[0].Origin in ['NHA','HTA'] and Segments[0].Destination in ['NHA','HTA'] or Segments[0].Origin in ['BQS','OVB'] and Segments[0].Destination in ['BQS','OVB'] or Segments[0].Origin in ['USM','MOW'] and Segments[0].Destination in ['USM','MOW'] or Segments[0].Origin in ['KBV','IKT'] and Segments[0].Destination in ['KBV','IKT'] or Segments[0].Origin in ['HKT','UFA'] and Segments[0].Destination in ['HKT','UFA'] or Segments[0].Origin in ['MOW','KHV'] and Segments[0].Destination in ['MOW','KHV'] or Segments[0].Origin in ['UTP','EGO'] and Segments[0].Destination in ['UTP','EGO'] or Segments[0].Origin in ['DXB','HTA'] and Segments[0].Destination in ['DXB','HTA'] or Segments[0].Origin in ['SGN','OMS'] and Segments[0].Destination in ['SGN','OMS'] or Segments[0].Origin in ['MOW','AER'] and Segments[0].Destination in ['MOW','AER'] or Segments[0].Origin in ['HTA','PUJ'] and Segments[0].Destination in ['HTA','PUJ'] or Segments[0].Origin in ['KJA','NHA'] and Segments[0].Destination in ['KJA','NHA'] or Segments[0].Origin in ['HKT','OMS'] and Segments[0].Destination in ['HKT','OMS'] or Segments[0].Origin in ['OGZ','PUJ'] and Segments[0].Destination in ['OGZ','PUJ'] or Segments[0].Origin in ['PUJ','UFA'] and Segments[0].Destination in ['PUJ','UFA'] or Segments[0].Origin in ['DXB','KUF'] and Segments[0].Destination in ['DXB','KUF'] or Segments[0].Origin in ['BKK','MCX'] and Segments[0].Destination in ['BKK','MCX'] or Segments[0].Origin in ['NHA','PKC'] and Segments[0].Destination in ['NHA','PKC'] or Segments[0].Origin in ['CUN','KJA'] and Segments[0].Destination in ['CUN','KJA'] or Segments[0].Origin in ['KRR','PUJ'] and Segments[0].Destination in ['KRR','PUJ'] or Segments[0].Origin in ['HKT','IKT'] and Segments[0].Destination in ['HKT','IKT'] or Segments[0].Origin in ['DXB','ROV'] and Segments[0].Destination in ['DXB','ROV'] or Segments[0].Origin in ['DXB','TJM'] and Segments[0].Destination in ['DXB','TJM'] or Segments[0].Origin in ['NHA','KJA'] and Segments[0].Destination in ['NHA','KJA'] or Segments[0].Origin in ['USM','OMS'] and Segments[0].Destination in ['USM','OMS'] or Segments[0].Origin in ['KHV','NHA'] and Segments[0].Destination in ['KHV','NHA'] or Segments[0].Origin in ['HRG','KGD'] and Segments[0].Destination in ['HRG','KGD'] or Segments[0].Origin in ['VOG','SSH'] and Segments[0].Destination in ['VOG','SSH'] or Segments[0].Origin in ['MCX','PUJ'] and Segments[0].Destination in ['MCX','PUJ'] or Segments[0].Origin in ['MOW','TIV'] and Segments[0].Destination in ['MOW','TIV'] or Segments[0].Origin in ['DXB','KRR'] and Segments[0].Destination in ['DXB','KRR'] or Segments[0].Origin in ['DNK','SKG'] and Segments[0].Destination in ['DNK','SKG'] or Segments[0].Origin in ['HKT','KZN'] and Segments[0].Destination in ['HKT','KZN'] or Segments[0].Origin in ['USM','LED'] and Segments[0].Destination in ['USM','LED'] or Segments[0].Origin in ['HKT','MRV'] and Segments[0].Destination in ['HKT','MRV'] or Segments[0].Origin in ['HKT','TOF'] and Segments[0].Destination in ['HKT','TOF'] or Segments[0].Origin in ['MOW','UFA'] and Segments[0].Destination in ['MOW','UFA'] or Segments[0].Origin in ['DXB','KEJ'] and Segments[0].Destination in ['DXB','KEJ'] or Segments[0].Origin in ['YKS','CUN'] and Segments[0].Destination in ['YKS','CUN'] or Segments[0].Origin in ['KEJ','HRG'] and Segments[0].Destination in ['KEJ','HRG'] or Segments[0].Origin in ['MCX','NHA'] and Segments[0].Destination in ['MCX','NHA'] or Segments[0].Origin in ['NHA','SCW'] and Segments[0].Destination in ['NHA','SCW'] or Segments[0].Origin in ['DXB','MRV'] and Segments[0].Destination in ['DXB','MRV'] or Segments[0].Origin in ['BKK','OGZ'] and Segments[0].Destination in ['BKK','OGZ'] or Segments[0].Origin in ['UTP','PEE'] and Segments[0].Destination in ['UTP','PEE'] or Segments[0].Origin in ['USM','ROV'] and Segments[0].Destination in ['USM','ROV'] or Segments[0].Origin in ['VRA','YKS'] and Segments[0].Destination in ['VRA','YKS'] or Segments[0].Origin in ['SHE','MOW'] and Segments[0].Destination in ['SHE','MOW'] or Segments[0].Origin in ['MOW','TSN'] and Segments[0].Destination in ['MOW','TSN'] or Segments[0].Origin in ['TOF','OVB'] and Segments[0].Destination in ['TOF','OVB'] or Segments[0].Origin in ['NHA','KEJ'] and Segments[0].Destination in ['NHA','KEJ'] or Segments[0].Origin in ['KGD','CUN'] and Segments[0].Destination in ['KGD','CUN'] or Segments[0].Origin in ['UTP','KUF'] and Segments[0].Destination in ['UTP','KUF'] or Segments[0].Origin in ['SIP','KZN'] and Segments[0].Destination in ['SIP','KZN'] or Segments[0].Origin in ['CUN','SCW'] and Segments[0].Destination in ['CUN','SCW'] or Segments[0].Origin in ['SHJ','REN'] and Segments[0].Destination in ['SHJ','REN'] or Segments[0].Origin in ['SGN','KRR'] and Segments[0].Destination in ['SGN','KRR'] or Segments[0].Origin in ['KEJ','NHA'] and Segments[0].Destination in ['KEJ','NHA'] or Segments[0].Origin in ['CFU','IEV'] and Segments[0].Destination in ['CFU','IEV'] or Segments[0].Origin in ['MOW','CUN'] and Segments[0].Destination in ['MOW','CUN'] or Segments[0].Origin in ['LCA','MOW'] and Segments[0].Destination in ['LCA','MOW'] or Segments[0].Origin in ['SSH','ROV'] and Segments[0].Destination in ['SSH','ROV'] or Segments[0].Origin in ['BUH','MOW'] and Segments[0].Destination in ['BUH','MOW'] or Segments[0].Origin in ['SGN','BQS'] and Segments[0].Destination in ['SGN','BQS'] or Segments[0].Origin in ['KUF','VRA'] and Segments[0].Destination in ['KUF','VRA'] or Segments[0].Origin in ['NHA','KHV'] and Segments[0].Destination in ['NHA','KHV'] or Segments[0].Origin in ['DXB','TOF'] and Segments[0].Destination in ['DXB','TOF'] or Segments[0].Origin in ['HKT','KUF'] and Segments[0].Destination in ['HKT','KUF'] or Segments[0].Origin in ['EGO','NHA'] and Segments[0].Destination in ['EGO','NHA'] or Segments[0].Origin in ['MOW','BCN'] and Segments[0].Destination in ['MOW','BCN'] or Segments[0].Origin in ['SCW','HRG'] and Segments[0].Destination in ['SCW','HRG'] or Segments[0].Origin in ['BAX','CUN'] and Segments[0].Destination in ['BAX','CUN'] or Segments[0].Origin in ['AYT','PEE'] and Segments[0].Destination in ['AYT','PEE'] or Segments[0].Origin in ['BKK','OMS'] and Segments[0].Destination in ['BKK','OMS'] or Segments[0].Origin in ['LCA','KRR'] and Segments[0].Destination in ['LCA','KRR'] or Segments[0].Origin in ['BKK','CEK'] and Segments[0].Destination in ['BKK','CEK'] or Segments[0].Origin in ['MOW','VRA'] and Segments[0].Destination in ['MOW','VRA'] or Segments[0].Origin in ['LED','ZTH'] and Segments[0].Destination in ['LED','ZTH'] or Segments[0].Origin in ['KEJ','VRA'] and Segments[0].Destination in ['KEJ','VRA'] or Segments[0].Origin in ['MOW','DYR'] and Segments[0].Destination in ['MOW','DYR'] or Segments[0].Origin in ['HKT','YKS'] and Segments[0].Destination in ['HKT','YKS'] or Segments[0].Origin in ['MOW','MIR'] and Segments[0].Destination in ['MOW','MIR'] or Segments[0].Origin in ['TRN','MOW'] and Segments[0].Destination in ['TRN','MOW'] or Segments[0].Origin in ['RVN','MOW'] and Segments[0].Destination in ['RVN','MOW'] or Segments[0].Origin in ['CEK','SSH'] and Segments[0].Destination in ['CEK','SSH'] or Segments[0].Origin in ['ETH','UFA'] and Segments[0].Destination in ['ETH','UFA'] or Segments[0].Origin in ['VRA','UFA'] and Segments[0].Destination in ['VRA','UFA'] or Segments[0].Origin in ['MOW','HER'] and Segments[0].Destination in ['MOW','HER'] or Segments[0].Origin in ['DXB','OMS'] and Segments[0].Destination in ['DXB','OMS'] or Segments[0].Origin in ['VRA','ROV'] and Segments[0].Destination in ['VRA','ROV'] or Segments[0].Origin in ['MRV','PUJ'] and Segments[0].Destination in ['MRV','PUJ'] or Segments[0].Origin in ['NHA','EGO'] and Segments[0].Destination in ['NHA','EGO'] or Segments[0].Origin in ['VRA','TOF'] and Segments[0].Destination in ['VRA','TOF'] or Segments[0].Origin in ['BOJ','LED'] and Segments[0].Destination in ['BOJ','LED'] or Segments[0].Origin in ['MOW','BHK'] and Segments[0].Destination in ['MOW','BHK'] or Segments[0].Origin in ['HKT','VVO'] and Segments[0].Destination in ['HKT','VVO'] or Segments[0].Origin in ['TOF','MOW'] and Segments[0].Destination in ['TOF','MOW'] or Segments[0].Origin in ['USM','KZN'] and Segments[0].Destination in ['USM','KZN'] or Segments[0].Origin in ['PUJ','KUF'] and Segments[0].Destination in ['PUJ','KUF'] or Segments[0].Origin in ['VOZ','PUJ'] and Segments[0].Destination in ['VOZ','PUJ'] or Segments[0].Origin in ['OVB','KRR'] and Segments[0].Destination in ['OVB','KRR'] or Segments[0].Origin in ['MOW','IKT'] and Segments[0].Destination in ['MOW','IKT'] or Segments[0].Origin in ['PEE','VRA'] and Segments[0].Destination in ['PEE','VRA'] or Segments[0].Origin in ['CFU','ROV'] and Segments[0].Destination in ['CFU','ROV'] or Segments[0].Origin in ['POP','MOW'] and Segments[0].Destination in ['POP','MOW'] or Segments[0].Origin in ['PUJ','SCW'] and Segments[0].Destination in ['PUJ','SCW'] or Segments[0].Origin in ['BAX','MOW'] and Segments[0].Destination in ['BAX','MOW'] or Segments[0].Origin in ['PUJ','SVX'] and Segments[0].Destination in ['PUJ','SVX'] or Segments[0].Origin in ['CUN','NJC'] and Segments[0].Destination in ['CUN','NJC'] or Segments[0].Origin in ['UTP','LED'] and Segments[0].Destination in ['UTP','LED'] or Segments[0].Origin in ['NHA','TJM'] and Segments[0].Destination in ['NHA','TJM'] or Segments[0].Origin in ['SGN','GOJ'] and Segments[0].Destination in ['SGN','GOJ'] or Segments[0].Origin in ['SSH','NBC'] and Segments[0].Destination in ['SSH','NBC'] or Segments[0].Origin in ['KJA','MOW'] and Segments[0].Destination in ['KJA','MOW'] or Segments[0].Origin in ['MOW','GPA'] and Segments[0].Destination in ['MOW','GPA'] or Segments[0].Origin in ['ATH','IEV'] and Segments[0].Destination in ['ATH','IEV'] or Segments[0].Origin in ['USM','VVO'] and Segments[0].Destination in ['USM','VVO'] or Segments[0].Origin in ['MOW','RMI'] and Segments[0].Destination in ['MOW','RMI'] or Segments[0].Origin in ['CEE','PUJ'] and Segments[0].Destination in ['CEE','PUJ'] or Segments[0].Origin in ['KRR','SKG'] and Segments[0].Destination in ['KRR','SKG'] or Segments[0].Origin in ['CUN','HTA'] and Segments[0].Destination in ['CUN','HTA'] or Segments[0].Origin in ['MRV','VRA'] and Segments[0].Destination in ['MRV','VRA'] or Segments[0].Origin in ['VRA','TJM'] and Segments[0].Destination in ['VRA','TJM'] or Segments[0].Origin in ['SKG','RIX'] and Segments[0].Destination in ['SKG','RIX'] or Segments[0].Origin in ['PRG','SVX'] and Segments[0].Destination in ['PRG','SVX'] or Segments[0].Origin in ['ABA','VRA'] and Segments[0].Destination in ['ABA','VRA'] or Segments[0].Origin in ['SGN','IKT'] and Segments[0].Destination in ['SGN','IKT'] or Segments[0].Origin in ['VOG','HRG'] and Segments[0].Destination in ['VOG','HRG'] or Segments[0].Origin in ['SVX','HER'] and Segments[0].Destination in ['SVX','HER'] or Segments[0].Origin in ['SHJ','VOG'] and Segments[0].Destination in ['SHJ','VOG'] or Segments[0].Origin in ['VRA','OGZ'] and Segments[0].Destination in ['VRA','OGZ'] or Segments[0].Origin in ['MOW','ZTH'] and Segments[0].Destination in ['MOW','ZTH'] or Segments[0].Origin in ['KJA','PUJ'] and Segments[0].Destination in ['KJA','PUJ'] or Segments[0].Origin in ['SSH','KJA'] and Segments[0].Destination in ['SSH','KJA'] or Segments[0].Origin in ['PUJ','NBC'] and Segments[0].Destination in ['PUJ','NBC'] or Segments[0].Origin in ['BKK','BAX'] and Segments[0].Destination in ['BKK','BAX'] or Segments[0].Origin in ['GOJ','HKT'] and Segments[0].Destination in ['GOJ','HKT'] or Segments[0].Origin in ['LED','AYT'] and Segments[0].Destination in ['LED','AYT'] or Segments[0].Origin in ['CEK','USM'] and Segments[0].Destination in ['CEK','USM'] or Segments[0].Origin in ['LED','SHJ'] and Segments[0].Destination in ['LED','SHJ'] or Segments[0].Origin in ['NOZ','BKK'] and Segments[0].Destination in ['NOZ','BKK'] or Segments[0].Origin in ['NOZ','PUJ'] and Segments[0].Destination in ['NOZ','PUJ'] or Segments[0].Origin in ['TJM','TDX'] and Segments[0].Destination in ['TJM','TDX'] or Segments[0].Origin in ['YKS','BKK'] and Segments[0].Destination in ['YKS','BKK'] or Segments[0].Origin in ['MOW','KUF'] and Segments[0].Destination in ['MOW','KUF'] or Segments[0].Origin in ['KJA','SGN'] and Segments[0].Destination in ['KJA','SGN'] or Segments[0].Origin in ['CEK','UTP'] and Segments[0].Destination in ['CEK','UTP'] or Segments[0].Origin in ['UFA','USM'] and Segments[0].Destination in ['UFA','USM'] or Segments[0].Origin in ['KZN','TDX'] and Segments[0].Destination in ['KZN','TDX'] or Segments[0].Origin in ['PEE','DXB'] and Segments[0].Destination in ['PEE','DXB'] or Segments[0].Origin in ['NJC','HKT'] and Segments[0].Destination in ['NJC','HKT'] or Segments[0].Origin in ['UFA','BKK'] and Segments[0].Destination in ['UFA','BKK'] or Segments[0].Origin in ['VOG','BKK'] and Segments[0].Destination in ['VOG','BKK'] or Segments[0].Origin in ['CEK','SGN'] and Segments[0].Destination in ['CEK','SGN'] or Segments[0].Origin in ['KZN','UTP'] and Segments[0].Destination in ['KZN','UTP'] or Segments[0].Origin in ['KJA','HKT'] and Segments[0].Destination in ['KJA','HKT'] or Segments[0].Origin in ['HTA','BKK'] and Segments[0].Destination in ['HTA','BKK'] or Segments[0].Origin in ['PEE','TDX'] and Segments[0].Destination in ['PEE','TDX'] or Segments[0].Origin in ['OVB','SGN'] and Segments[0].Destination in ['OVB','SGN'] or Segments[0].Origin in ['AER','HKT'] and Segments[0].Destination in ['AER','HKT'] or Segments[0].Origin in ['CUN','CEE'] and Segments[0].Destination in ['CUN','CEE'] or Segments[0].Origin in ['OGZ','MOW'] and Segments[0].Destination in ['OGZ','MOW'] or Segments[0].Origin in ['SVX','AQJ'] and Segments[0].Destination in ['SVX','AQJ'] or Segments[0].Origin in ['SVX','SHJ'] and Segments[0].Destination in ['SVX','SHJ'] or Segments[0].Origin in ['NHA','BTK'] and Segments[0].Destination in ['NHA','BTK'] or Segments[0].Origin in ['KZN','AQJ'] and Segments[0].Destination in ['KZN','AQJ'] or Segments[0].Origin in ['VOZ','DXB'] and Segments[0].Destination in ['VOZ','DXB'] or Segments[0].Origin in ['OGZ','HKT'] and Segments[0].Destination in ['OGZ','HKT'] or Segments[0].Origin in ['MOW','KLV'] and Segments[0].Destination in ['MOW','KLV'] or Segments[0].Origin in ['MOW','AQJ'] and Segments[0].Destination in ['MOW','AQJ'] or Segments[0].Origin in ['AER','SGN'] and Segments[0].Destination in ['AER','SGN'] or Segments[0].Origin in ['OVB','BKK'] and Segments[0].Destination in ['OVB','BKK'] or Segments[0].Origin in ['UFA','AYT'] and Segments[0].Destination in ['UFA','AYT'] or Segments[0].Origin in ['NOZ','SGN'] and Segments[0].Destination in ['NOZ','SGN'] or Segments[0].Origin in ['NBC','SGN'] and Segments[0].Destination in ['NBC','SGN'] or Segments[0].Origin in ['BQS','TDX'] and Segments[0].Destination in ['BQS','TDX'] or Segments[0].Origin in ['SGC','NHA'] and Segments[0].Destination in ['SGC','NHA'] or Segments[0].Origin in ['UFA','NHA'] and Segments[0].Destination in ['UFA','NHA'] or Segments[0].Origin in ['ROV','TDX'] and Segments[0].Destination in ['ROV','TDX'] or Segments[0].Origin in ['KZN','BKK'] and Segments[0].Destination in ['KZN','BKK'] or Segments[0].Origin in ['KJA','DXB'] and Segments[0].Destination in ['KJA','DXB'] or Segments[0].Origin in ['CEK','DXB'] and Segments[0].Destination in ['CEK','DXB'] or Segments[0].Origin in ['OVB','KBV'] and Segments[0].Destination in ['OVB','KBV'] or Segments[0].Origin in ['PEE','KBV'] and Segments[0].Destination in ['PEE','KBV'] or Segments[0].Origin in ['SVX','LED'] and Segments[0].Destination in ['SVX','LED'] or Segments[0].Origin in ['CUN','AAQ'] and Segments[0].Destination in ['CUN','AAQ'] or Segments[0].Origin in ['KEJ','BKK'] and Segments[0].Destination in ['KEJ','BKK'] or Segments[0].Origin in ['BQS','BKK'] and Segments[0].Destination in ['BQS','BKK'] or Segments[0].Origin in ['IKT','DXB'] and Segments[0].Destination in ['IKT','DXB'] or Segments[0].Origin in ['KUF','BKK'] and Segments[0].Destination in ['KUF','BKK'] or Segments[0].Origin in ['VVO','BKK'] and Segments[0].Destination in ['VVO','BKK'] or Segments[0].Origin in ['OVB','HKT'] and Segments[0].Destination in ['OVB','HKT'] or Segments[0].Origin in ['NHA','RTW'] and Segments[0].Destination in ['NHA','RTW'] or Segments[0].Origin in ['VOG','SGN'] and Segments[0].Destination in ['VOG','SGN'] or Segments[0].Origin in ['VVO','KBV'] and Segments[0].Destination in ['VVO','KBV'] or Segments[0].Origin in ['TOF','PUJ'] and Segments[0].Destination in ['TOF','PUJ'] or Segments[0].Origin in ['KEJ','HKT'] and Segments[0].Destination in ['KEJ','HKT'] or Segments[0].Origin in ['TJM','HKT'] and Segments[0].Destination in ['TJM','HKT'] or Segments[0].Origin in ['ROV','POP'] and Segments[0].Destination in ['ROV','POP'] or Segments[0].Origin in ['REN','ETH'] and Segments[0].Destination in ['REN','ETH'] or Segments[0].Origin in ['PEE','USM'] and Segments[0].Destination in ['PEE','USM'] or Segments[0].Origin in ['KEJ','SGN'] and Segments[0].Destination in ['KEJ','SGN'] or Segments[0].Origin in ['AER','DXB'] and Segments[0].Destination in ['AER','DXB'] or Segments[0].Origin in ['VOG','MOW'] and Segments[0].Destination in ['VOG','MOW'] or Segments[0].Origin in ['YKS','SGN'] and Segments[0].Destination in ['YKS','SGN'] or Segments[0].Origin in ['UFA','TDX'] and Segments[0].Destination in ['UFA','TDX'] or Segments[0].Origin in ['CUN','ABA'] and Segments[0].Destination in ['CUN','ABA'] or Segments[0].Origin in ['HRG','TJM'] and Segments[0].Destination in ['HRG','TJM'] or Segments[0].Origin in ['HTA','HKT'] and Segments[0].Destination in ['HTA','HKT'] or Segments[0].Origin in ['NBC','HKT'] and Segments[0].Destination in ['NBC','HKT'] or Segments[0].Origin in ['TOF','SGN'] and Segments[0].Destination in ['TOF','SGN'] or Segments[0].Origin in ['MCX','HKT'] and Segments[0].Destination in ['MCX','HKT'] or Segments[0].Origin in ['VRA','CEE'] and Segments[0].Destination in ['VRA','CEE'] or Segments[0].Origin in ['CUN','RTW'] and Segments[0].Destination in ['CUN','RTW'] or Segments[0].Origin in ['VOZ','SGN'] and Segments[0].Destination in ['VOZ','SGN'] or Segments[0].Origin in ['BQS','USM'] and Segments[0].Destination in ['BQS','USM'] or Segments[0].Origin in ['SGC','USM'] and Segments[0].Destination in ['SGC','USM'] or Segments[0].Origin in ['KZN','DXB'] and Segments[0].Destination in ['KZN','DXB'] or Segments[0].Origin in ['KEJ','TDX'] and Segments[0].Destination in ['KEJ','TDX'] or Segments[0].Origin in ['UFA','DXB'] and Segments[0].Destination in ['UFA','DXB'] or Segments[0].Origin in ['LED','HKT'] and Segments[0].Destination in ['LED','HKT'] or Segments[0].Origin in ['NJC','SGN'] and Segments[0].Destination in ['NJC','SGN'] or Segments[0].Origin in ['KUF','SHJ'] and Segments[0].Destination in ['KUF','SHJ'] or Segments[0].Origin in ['LED','AQJ'] and Segments[0].Destination in ['LED','AQJ'] or Segments[0].Origin in ['KJA','SIP'] and Segments[0].Destination in ['KJA','SIP'] or Segments[0].Origin in ['SGC','BKK'] and Segments[0].Destination in ['SGC','BKK'] or Segments[0].Origin in ['KJA','BKK'] and Segments[0].Destination in ['KJA','BKK'] or Segments[0].Origin in ['VOG','DXB'] and Segments[0].Destination in ['VOG','DXB'] or Segments[0].Origin in ['KEJ','USM'] and Segments[0].Destination in ['KEJ','USM'] or Segments[0].Origin in ['VVO','SGN'] and Segments[0].Destination in ['VVO','SGN'] or Segments[0].Origin in ['MOW','SIP'] and Segments[0].Destination in ['MOW','SIP'] or Segments[0].Origin in ['MOW','ROV'] and Segments[0].Destination in ['MOW','ROV'] or Segments[0].Origin in ['TJM','KBV'] and Segments[0].Destination in ['TJM','KBV'] or Segments[0].Origin in ['ROV','HKT'] and Segments[0].Destination in ['ROV','HKT'] or Segments[0].Origin in ['YKS','DXB'] and Segments[0].Destination in ['YKS','DXB'] or Segments[0].Origin in ['MOW','GDX'] and Segments[0].Destination in ['MOW','GDX'] or Segments[0].Origin in ['VOG','HKT'] and Segments[0].Destination in ['VOG','HKT'] or Segments[0].Origin in ['EGO','BKK'] and Segments[0].Destination in ['EGO','BKK'] or Segments[0].Origin in ['KGD','MOW'] and Segments[0].Destination in ['KGD','MOW'] or Segments[0].Origin in ['IKT','USM'] and Segments[0].Destination in ['IKT','USM'] or Segments[0].Origin in ['MOW','TDX'] and Segments[0].Destination in ['MOW','TDX'] or Segments[0].Origin in ['SVX','SGN'] and Segments[0].Destination in ['SVX','SGN'] or Segments[0].Origin in ['KRR','VRN'] and Segments[0].Destination in ['KRR','VRN'] or Segments[0].Origin in ['BAX','PUJ'] and Segments[0].Destination in ['BAX','PUJ'] or Segments[0].Origin in ['HRG','LED'] and Segments[0].Destination in ['HRG','LED'] or Segments[0].Origin in ['ASF','BKK'] and Segments[0].Destination in ['ASF','BKK'] or Segments[0].Origin in ['ROV','SHJ'] and Segments[0].Destination in ['ROV','SHJ'] or Segments[0].Origin in ['KRR','HKT'] and Segments[0].Destination in ['KRR','HKT'] or Segments[0].Origin in ['MOW','AYT'] and Segments[0].Destination in ['MOW','AYT'] or Segments[0].Origin in ['SVX','HKT'] and Segments[0].Destination in ['SVX','HKT'] or Segments[0].Origin in ['SVX','BKK'] and Segments[0].Destination in ['SVX','BKK'] or Segments[0].Origin in ['MOW','SGN'] and Segments[0].Destination in ['MOW','SGN'] or Segments[0].Origin in ['PEE','SSH'] and Segments[0].Destination in ['PEE','SSH'] or Segments[0].Origin in ['MOW','DXB'] and Segments[0].Destination in ['MOW','DXB'] or Segments[0].Origin in ['YKS','PUJ'] and Segments[0].Destination in ['YKS','PUJ'] or Segments[0].Origin in ['MOW','AUH'] and Segments[0].Destination in ['MOW','AUH'] or Segments[0].Origin in ['IKT','UTP'] and Segments[0].Destination in ['IKT','UTP'] or Segments[0].Origin in ['ROV','BKK'] and Segments[0].Destination in ['ROV','BKK'] or Segments[0].Origin in ['KGD','SGN'] and Segments[0].Destination in ['KGD','SGN'] or Segments[0].Origin in ['SCW','HKT'] and Segments[0].Destination in ['SCW','HKT'] or Segments[0].Origin in ['KGD','BKK'] and Segments[0].Destination in ['KGD','BKK'] or Segments[0].Origin in ['SGC','HKT'] and Segments[0].Destination in ['SGC','HKT'] or Segments[0].Origin in ['TSE','SKG'] and Segments[0].Destination in ['TSE','SKG'] or Segments[0].Origin in ['PKC','BKK'] and Segments[0].Destination in ['PKC','BKK'] or Segments[0].Origin in ['KEJ','KBV'] and Segments[0].Destination in ['KEJ','KBV'] or Segments[0].Origin in ['SCW','BKK'] and Segments[0].Destination in ['SCW','BKK'] or Segments[0].Origin in ['MOW','AMM'] and Segments[0].Destination in ['MOW','AMM'] or Segments[0].Origin in ['KZN','SGN'] and Segments[0].Destination in ['KZN','SGN'] or Segments[0].Origin in ['AER','VOG'] and Segments[0].Destination in ['AER','VOG'] or Segments[0].Origin in ['SVX','DXB'] and Segments[0].Destination in ['SVX','DXB'] or Segments[0].Origin in ['BQS','HKT'] and Segments[0].Destination in ['BQS','HKT'] or Segments[0].Origin in ['LED','DXB'] and Segments[0].Destination in ['LED','DXB'] or Segments[0].Origin in ['ROV','KBV'] and Segments[0].Destination in ['ROV','KBV'] or Segments[0].Origin in ['REN','BKK'] and Segments[0].Destination in ['REN','BKK'] or Segments[0].Origin in ['PEE','HKT'] and Segments[0].Destination in ['PEE','HKT'] or Segments[0].Origin in ['AER','BKK'] and Segments[0].Destination in ['AER','BKK'] or Segments[0].Origin in ['SCW','SGN'] and Segments[0].Destination in ['SCW','SGN'] or Segments[0].Origin in ['KUF','SIP'] and Segments[0].Destination in ['KUF','SIP'] or Segments[0].Origin in ['KRR','AQJ'] and Segments[0].Destination in ['KRR','AQJ'] or Segments[0].Origin in ['MOW','KBV'] and Segments[0].Destination in ['MOW','KBV'] or Segments[0].Origin in ['PEE','BKK'] and Segments[0].Destination in ['PEE','BKK'] or Segments[0].Origin in ['NBC','DXB'] and Segments[0].Destination in ['NBC','DXB'] or Segments[0].Origin in ['UUD','HKT'] and Segments[0].Destination in ['UUD','HKT'] or Segments[0].Origin in ['OVB','BTK'] and Segments[0].Destination in ['OVB','BTK'] or Segments[0].Origin in ['OVB','USM'] and Segments[0].Destination in ['OVB','USM'] or Segments[0].Origin in ['VRA','RTW'] and Segments[0].Destination in ['VRA','RTW'] or Segments[0].Origin in ['VOZ','SHJ'] and Segments[0].Destination in ['VOZ','SHJ'] or Segments[0].Origin in ['NOZ','DXB'] and Segments[0].Destination in ['NOZ','DXB'] or Segments[0].Origin in ['SGC','SGN'] and Segments[0].Destination in ['SGC','SGN'] or Segments[0].Origin in ['SVX','AYT'] and Segments[0].Destination in ['SVX','AYT'] or Segments[0].Origin in ['KZN','KBV'] and Segments[0].Destination in ['KZN','KBV'] or Segments[0].Origin in ['TJM','USM'] and Segments[0].Destination in ['TJM','USM'] or Segments[0].Origin in ['ROV','SGN'] and Segments[0].Destination in ['ROV','SGN'] or Segments[0].Origin in ['LED','AMM'] and Segments[0].Destination in ['LED','AMM'] or Segments[0].Origin in ['PUJ','RTW'] and Segments[0].Destination in ['PUJ','RTW'] or Segments[0].Origin in ['NJC','BKK'] and Segments[0].Destination in ['NJC','BKK'] or Segments[0].Origin in ['MOW','ROM'] and Segments[0].Destination in ['MOW','ROM'] or Segments[0].Origin in ['VOZ','BKK'] and Segments[0].Destination in ['VOZ','BKK'] or Segments[0].Origin in ['LED','KRR'] and Segments[0].Destination in ['LED','KRR'] or Segments[0].Origin in ['KUF','SGN'] and Segments[0].Destination in ['KUF','SGN'] or Segments[0].Origin in ['MRV','SGN'] and Segments[0].Destination in ['MRV','SGN'] or Segments[0].Origin in ['SSH','KGD'] and Segments[0].Destination in ['SSH','KGD'] or Segments[0].Origin in ['KRR','BKK'] and Segments[0].Destination in ['KRR','BKK'] or Segments[0].Origin in ['OVB','DXB'] and Segments[0].Destination in ['OVB','DXB'] or Segments[0].Origin in ['MRV','BKK'] and Segments[0].Destination in ['MRV','BKK'] or Segments[0].Origin in ['LED','BKK'] and Segments[0].Destination in ['LED','BKK'] or Segments[0].Origin in ['LED','SGN'] and Segments[0].Destination in ['LED','SGN'] or Segments[0].Origin in ['REN','HKT'] and Segments[0].Destination in ['REN','HKT'] or Segments[0].Origin in ['UUD','BKK'] and Segments[0].Destination in ['UUD','BKK'] or Segments[0].Origin in ['GOJ','PUJ'] and Segments[0].Destination in ['GOJ','PUJ'] or Segments[0].Origin in ['BAX','TDX'] and Segments[0].Destination in ['BAX','TDX'] or Segments[0].Origin in ['KJA','UTP'] and Segments[0].Destination in ['KJA','UTP'] or Segments[0].Origin in ['KHV','BKK'] and Segments[0].Destination in ['KHV','BKK'] or Segments[0].Origin in ['MOW','BER'] and Segments[0].Destination in ['MOW','BER'] or Segments[0].Origin in ['KHV','SGN'] and Segments[0].Destination in ['KHV','SGN'] or Segments[0].Origin in ['NJC','DXB'] and Segments[0].Destination in ['NJC','DXB'] or Segments[0].Origin in ['BAX','USM'] and Segments[0].Destination in ['BAX','USM'] or Segments[0].Origin in ['VRN','ROV'] and Segments[0].Destination in ['VRN','ROV'] or Segments[0].Origin in ['IKT','BKK'] and Segments[0].Destination in ['IKT','BKK'] or Segments[0].Origin in ['SGC','TDX'] and Segments[0].Destination in ['SGC','TDX'] or Segments[0].Origin in ['TOF','BKK'] and Segments[0].Destination in ['TOF','BKK'] or Segments[0].Origin in ['SVX','SIP'] and Segments[0].Destination in ['SVX','SIP'] or Segments[0].Origin in ['HRG','PEE'] and Segments[0].Destination in ['HRG','PEE'] or Segments[0].Origin in ['MOW','GVA'] and Segments[0].Destination in ['MOW','GVA'] or Segments[0].Origin in ['MOW','MUC'] and Segments[0].Destination in ['MOW','MUC'] or Segments[0].Origin in ['BAX','HKT'] and Segments[0].Destination in ['BAX','HKT'] or Segments[0].Origin in ['HTA','SGN'] and Segments[0].Destination in ['HTA','SGN'] or Segments[0].Origin in ['MOW','SHJ'] and Segments[0].Destination in ['MOW','SHJ'] or Segments[0].Origin in ['UFA','KBV'] and Segments[0].Destination in ['UFA','KBV'] or Segments[0].Origin in ['MOW','DJE'] and Segments[0].Destination in ['MOW','DJE'] or Segments[0].Origin in ['PEE','SGN'] and Segments[0].Destination in ['PEE','SGN'] or Segments[0].Origin in ['LED','CUN'] and Segments[0].Destination in ['LED','CUN'] or Segments[0].Origin in ['SVX','MOW'] and Segments[0].Destination in ['SVX','MOW'] or Segments[0].Origin in ['SGC','KBV'] and Segments[0].Destination in ['SGC','KBV'] or Segments[0].Origin in ['GOJ','DXB'] and Segments[0].Destination in ['GOJ','DXB'] or Segments[0].Origin in ['BAX','SGN'] and Segments[0].Destination in ['BAX','SGN'] or Segments[0].Origin in ['HRG','ROV'] and Segments[0].Destination in ['HRG','ROV'] or Segments[0].Origin in ['IKT','TDX'] and Segments[0].Destination in ['IKT','TDX'] or Segments[0].Origin in ['UFA','SGN'] and Segments[0].Destination in ['UFA','SGN'] or Segments[0].Origin in ['KHV','HKT'] and Segments[0].Destination in ['KHV','HKT'] or Segments[0].Origin in ['KRR','SIP'] and Segments[0].Destination in ['KRR','SIP'] or Segments[0].Origin in ['VRA','AAQ'] and Segments[0].Destination in ['VRA','AAQ'] or Segments[0].Origin in ['BQS','KBV'] and Segments[0].Destination in ['BQS','KBV'] or Segments[0].Origin in ['NBC','BKK'] and Segments[0].Destination in ['NBC','BKK'] or Segments[0].Origin in ['NOZ','HKT'] and Segments[0].Destination in ['NOZ','HKT'] or Segments[0].Origin in ['LED','SIP'] and Segments[0].Destination in ['LED','SIP'] or Segments[0].Origin in ['BGY','MOW'] and Segments[0].Destination in ['BGY','MOW'] or Segments[0].Origin in ['EGO','HKT'] and Segments[0].Destination in ['EGO','HKT'] or Segments[0].Origin in ['OVB','NHA'] and Segments[0].Destination in ['OVB','NHA'] or Segments[0].Origin in ['TJM','BKK'] and Segments[0].Destination in ['TJM','BKK'] or Segments[0].Origin in ['BAX','DXB'] and Segments[0].Destination in ['BAX','DXB'] or Segments[0].Origin in ['CEK','HKT'] and Segments[0].Destination in ['CEK','HKT'] or Segments[0].Origin in ['KGD','HKT'] and Segments[0].Destination in ['KGD','HKT'] or Segments[0].Origin in ['SVX','USM'] and Segments[0].Destination in ['SVX','USM'] or Segments[0].Origin in ['BAX','KBV'] and Segments[0].Destination in ['BAX','KBV'] or Segments[0].Origin in ['UFA','SIP'] and Segments[0].Destination in ['UFA','SIP'] or Segments[0].Origin in ['LED','NHA'] and Segments[0].Destination in ['LED','NHA'] or Segments[0].Origin in ['VOZ','HKT'] and Segments[0].Destination in ['VOZ','HKT'] or Segments[0].Origin in ['GOJ','BKK'] and Segments[0].Destination in ['GOJ','BKK'] or Segments[0].Origin in ['ASF','HKT'] and Segments[0].Destination in ['ASF','HKT'] or Segments[0].Origin in ['AER','SIP'] and Segments[0].Destination in ['AER','SIP'] or Segments[0].Origin in ['TJM','SGN'] and Segments[0].Destination in ['TJM','SGN'] or Segments[0].Origin in ['MOW','MIL'] and Segments[0].Destination in ['MOW','MIL'] or Segments[0].Origin in ['MOW','USM'] and Segments[0].Destination in ['MOW','USM'] or Segments[0].Origin in ['IKT','KBV'] and Segments[0].Destination in ['IKT','KBV'] or Segments[0].Origin in ['UFA','HKT'] and Segments[0].Destination in ['UFA','HKT'] or Segments[0].Origin in ['EGO','UTP'] and Segments[0].Destination in ['EGO','UTP'] or Segments[0].Origin in ['HTA','DXB'] and Segments[0].Destination in ['HTA','DXB'] or Segments[0].Origin in ['OMS','SGN'] and Segments[0].Destination in ['OMS','SGN'] or Segments[0].Origin in ['PUJ','HTA'] and Segments[0].Destination in ['PUJ','HTA'] or Segments[0].Origin in ['OMS','HKT'] and Segments[0].Destination in ['OMS','HKT'] or Segments[0].Origin in ['KUF','DXB'] and Segments[0].Destination in ['KUF','DXB'] or Segments[0].Origin in ['MCX','BKK'] and Segments[0].Destination in ['MCX','BKK'] or Segments[0].Origin in ['IKT','HKT'] and Segments[0].Destination in ['IKT','HKT'] or Segments[0].Origin in ['ROV','DXB'] and Segments[0].Destination in ['ROV','DXB'] or Segments[0].Origin in ['TJM','DXB'] and Segments[0].Destination in ['TJM','DXB'] or Segments[0].Origin in ['OMS','USM'] and Segments[0].Destination in ['OMS','USM'] or Segments[0].Origin in ['KRR','DXB'] and Segments[0].Destination in ['KRR','DXB'] or Segments[0].Origin in ['KZN','HKT'] and Segments[0].Destination in ['KZN','HKT'] or Segments[0].Origin in ['LED','USM'] and Segments[0].Destination in ['LED','USM'] or Segments[0].Origin in ['MRV','HKT'] and Segments[0].Destination in ['MRV','HKT'] or Segments[0].Origin in ['TOF','HKT'] and Segments[0].Destination in ['TOF','HKT'] or Segments[0].Origin in ['KEJ','DXB'] and Segments[0].Destination in ['KEJ','DXB'] or Segments[0].Origin in ['MRV','DXB'] and Segments[0].Destination in ['MRV','DXB'] or Segments[0].Origin in ['OGZ','BKK'] and Segments[0].Destination in ['OGZ','BKK'] or Segments[0].Origin in ['PEE','UTP'] and Segments[0].Destination in ['PEE','UTP'] or Segments[0].Origin in ['ROV','USM'] and Segments[0].Destination in ['ROV','USM'] or Segments[0].Origin in ['KUF','UTP'] and Segments[0].Destination in ['KUF','UTP'] or Segments[0].Origin in ['KZN','SIP'] and Segments[0].Destination in ['KZN','SIP'] or Segments[0].Origin in ['REN','SHJ'] and Segments[0].Destination in ['REN','SHJ'] or Segments[0].Origin in ['KRR','SGN'] and Segments[0].Destination in ['KRR','SGN'] or Segments[0].Origin in ['MOW','BUH'] and Segments[0].Destination in ['MOW','BUH'] or Segments[0].Origin in ['BQS','SGN'] and Segments[0].Destination in ['BQS','SGN'] or Segments[0].Origin in ['TOF','DXB'] and Segments[0].Destination in ['TOF','DXB'] or Segments[0].Origin in ['KUF','HKT'] and Segments[0].Destination in ['KUF','HKT'] or Segments[0].Origin in ['HRG','SCW'] and Segments[0].Destination in ['HRG','SCW'] or Segments[0].Origin in ['PEE','AYT'] and Segments[0].Destination in ['PEE','AYT'] or Segments[0].Origin in ['OMS','BKK'] and Segments[0].Destination in ['OMS','BKK'] or Segments[0].Origin in ['CEK','BKK'] and Segments[0].Destination in ['CEK','BKK'] or Segments[0].Origin in ['YKS','HKT'] and Segments[0].Destination in ['YKS','HKT'] or Segments[0].Origin in ['MOW','TRN'] and Segments[0].Destination in ['MOW','TRN'] or Segments[0].Origin in ['OMS','DXB'] and Segments[0].Destination in ['OMS','DXB'] or Segments[0].Origin in ['VVO','HKT'] and Segments[0].Destination in ['VVO','HKT'] or Segments[0].Origin in ['KZN','USM'] and Segments[0].Destination in ['KZN','USM'] or Segments[0].Origin in ['MOW','POP'] and Segments[0].Destination in ['MOW','POP'] or Segments[0].Origin in ['LED','UTP'] and Segments[0].Destination in ['LED','UTP'] or Segments[0].Origin in ['GOJ','SGN'] and Segments[0].Destination in ['GOJ','SGN'] or Segments[0].Origin in ['VVO','USM'] and Segments[0].Destination in ['VVO','USM'] or Segments[0].Origin in ['PUJ','CEE'] and Segments[0].Destination in ['PUJ','CEE'] or Segments[0].Origin in ['SVX','PRG'] and Segments[0].Destination in ['SVX','PRG'] or Segments[0].Origin in ['VRA','ABA'] and Segments[0].Destination in ['VRA','ABA'] or Segments[0].Origin in ['IKT','SGN'] and Segments[0].Destination in ['IKT','SGN'] or Segments[0].Origin in ['VOG','SHJ'] and Segments[0].Destination in ['VOG','SHJ'])`
+
 	program, err := expr.Compile(expression, expr.Env(env))
 	if err != nil {
 		b.Fatal(err)
 	}
 
-	var out interface{}
-	for n := 0; n < b.N; n++ {
-		out, err = vm.Run(program, env)
-	}
+	b.Run("no_common_reused", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			var out interface{}
+			out, err = vm.Run(program, env)
+			if err != nil {
+				b.Fatal(err)
+			}
+			if !out.(bool) {
+				b.Fail()
+			}
+		}
+	})
+
+	program, err = expr.Compile(expression, expr.Env(env), expr.AllowReuseCommon(true))
 	if err != nil {
 		b.Fatal(err)
 	}
-	if !out.(bool) {
-		b.Fail()
-	}
+
+	b.Run("allow_common_reused", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			var out interface{}
+			out, err = vm.Run(program, env)
+			if err != nil {
+				b.Fatal(err)
+			}
+			if !out.(bool) {
+				b.Fail()
+			}
+		}
+	})
 }
diff --git a/compiler/analysis_common.go b/compiler/analysis_common.go
new file mode 100644
index 000000000..4b5d82ecf
--- /dev/null
+++ b/compiler/analysis_common.go
@@ -0,0 +1,369 @@
+package compiler
+
+import (
+	"crypto/sha1"
+	"fmt"
+	"sort"
+	"strconv"
+	"strings"
+
+	"github.com/antonmedv/expr/ast"
+	"github.com/antonmedv/expr/file"
+)
+
+func (c *compiler) analyzeCommonExpr(node ast.Node) {
+	switch n := node.(type) {
+	case *ast.NilNode:
+		c.analyzeCommonNilNode(n)
+	case *ast.IdentifierNode:
+		c.analyzeCommonIdentifierNode(n)
+	case *ast.IntegerNode:
+		c.analyzeCommonIntegerNode(n)
+	case *ast.FloatNode:
+		c.analyzeCommonFloatNode(n)
+	case *ast.BoolNode:
+		c.analyzeCommonBoolNode(n)
+	case *ast.StringNode:
+		c.analyzeCommonStringNode(n)
+	case *ast.ConstantNode:
+		c.analyzeCommonConstantNode(n)
+	case *ast.UnaryNode:
+		c.analyzeCommonUnaryNode(n)
+	case *ast.BinaryNode:
+		c.analyzeCommonBinaryNode(n)
+	case *ast.ChainNode:
+		c.analyzeCommonChainNode(n)
+	case *ast.MemberNode:
+		c.analyzeCommonMemberNode(n)
+	case *ast.SliceNode:
+		c.analyzeCommonSliceNode(n)
+	case *ast.CallNode:
+		c.checkCallNode(n)
+	case *ast.BuiltinNode:
+		c.analyzeCommonBuiltinNode(n)
+	case *ast.ClosureNode:
+		c.analyzeCommonClosureNode(n)
+	case *ast.PointerNode:
+		c.analyzeCommonPointerNode(n)
+	case *ast.ConditionalNode:
+		c.analyzeCommonConditionalNode(n)
+	case *ast.ArrayNode:
+		c.analyzeCommonArrayNode(n)
+	case *ast.MapNode:
+		c.analyzeCommonMapNode(n)
+	case *ast.PairNode:
+		// do nothing
+	default:
+		panic(fmt.Sprintf("undefined node type (%T)", node))
+	}
+}
+
+func (c *compiler) analyzeCommonNilNode(n *ast.NilNode) {
+	n.SetSubExpr("nil")
+}
+
+func (c *compiler) analyzeCommonIdentifierNode(n *ast.IdentifierNode) {
+	n.SetSubExpr(n.Value)
+}
+
+func (c *compiler) analyzeCommonIntegerNode(n *ast.IntegerNode) {
+	n.SetSubExpr(strconv.FormatInt(int64(n.Value), 10))
+}
+
+func (c *compiler) analyzeCommonFloatNode(n *ast.FloatNode) {
+	n.SetSubExpr(strconv.FormatFloat(n.Value, 'f', 10, 64))
+}
+
+func (c *compiler) analyzeCommonBoolNode(n *ast.BoolNode) {
+	n.SetSubExpr(strconv.FormatBool(n.Value))
+}
+
+func (c *compiler) analyzeCommonStringNode(n *ast.StringNode) {
+	n.SetSubExpr(strconv.Quote(n.Value))
+}
+
+func (c *compiler) analyzeCommonConstantNode(n *ast.ConstantNode) {
+	var s string
+	switch n.Value.(type) {
+	case string:
+		s = strconv.Quote(n.Value.(string))
+	case int:
+		s = strconv.FormatInt(int64(n.Value.(int)), 10)
+	case int8:
+		s = strconv.FormatInt(int64(n.Value.(int8)), 10)
+	case int16:
+		s = strconv.FormatInt(int64(n.Value.(int16)), 10)
+	case int32:
+		s = strconv.FormatInt(int64(n.Value.(int32)), 10)
+	case int64:
+		s = strconv.FormatInt(n.Value.(int64), 10)
+	case uint:
+		s = strconv.FormatUint(uint64(n.Value.(uint)), 10)
+	case uint8:
+		s = strconv.FormatUint(uint64(n.Value.(uint8)), 10)
+	case uint16:
+		s = strconv.FormatUint(uint64(n.Value.(uint16)), 10)
+	case uint32:
+		s = strconv.FormatUint(uint64(n.Value.(uint32)), 10)
+	case uint64:
+		s = strconv.FormatUint(uint64(n.Value.(uint64)), 10)
+	case float32:
+		s = strconv.FormatFloat(float64(n.Value.(float32)), 'f', 10, 32)
+	case float64:
+		s = strconv.FormatFloat(n.Value.(float64), 'f', 10, 64)
+	default:
+		s = fmt.Sprintf("%+v", n.Value)
+	}
+	n.SetSubExpr(s)
+}
+
+func (c *compiler) analyzeCommonUnaryNode(n *ast.UnaryNode) {
+	c.analyzeCommonExpr(n.Node)
+	buf := strings.Builder{}
+	switch n.Operator {
+	case "+":
+		buf.WriteString("")
+	case "-":
+		buf.WriteString("-(")
+	case "not", "!":
+		buf.WriteString("not (")
+	}
+	buf.WriteString(n.Node.SubExpr())
+	buf.WriteString(")")
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) analyzeCommonBinaryNode(n *ast.BinaryNode) {
+	c.analyzeCommonExpr(n.Left)
+	c.analyzeCommonExpr(n.Right)
+
+	ls := n.Left.SubExpr()
+	rs := n.Right.SubExpr()
+	_, lw := n.Left.(*ast.BinaryNode)
+	_, rw := n.Right.(*ast.BinaryNode)
+	op := n.Operator
+	switch op {
+	case "==", "!=", "and", "or", "+", "*", "||", "&&", ">=", "<=": // right / left can be swap
+		if op == ">=" || op == "<=" || rs <= ls {
+			ls, rs = rs, ls
+			lw, rw = rw, lw
+		}
+		if op == "&&" {
+			op = "and"
+		} else if op == "||" {
+			op = "or"
+		} else if op == ">=" {
+			op = "<"
+		} else if op == "<=" {
+			op = ">"
+		}
+	case "**", "^":
+		op = "**"
+	default:
+		// do nothing
+	}
+
+	buf := strings.Builder{}
+	if lw {
+		buf.WriteString("(")
+		buf.WriteString(ls)
+		buf.WriteString(")")
+	} else {
+		buf.WriteString(ls)
+	}
+	buf.WriteString(" " + op + " ")
+	if rw {
+		buf.WriteString("(")
+		buf.WriteString(rs)
+		buf.WriteString(")")
+	} else {
+		buf.WriteString(rs)
+	}
+	n.SetSubExpr(buf.String())
+
+	switch n.Operator {
+	case "??", "and", "or", "||", "&&":
+		// do nothing
+	default:
+		c.countCommonExpr(n.SubExpr(), n.Location())
+	}
+}
+
+func (c *compiler) analyzeCommonChainNode(n *ast.ChainNode) {
+	c.analyzeCommonExpr(n.Node)
+	n.SetSubExpr(n.Node.SubExpr())
+}
+
+func (c *compiler) analyzeCommonMemberNode(n *ast.MemberNode) {
+	c.analyzeCommonExpr(n.Node)
+	buf := strings.Builder{}
+	buf.WriteString(n.Node.SubExpr())
+	if n.Method {
+		buf.WriteString(".")
+		buf.WriteString(n.Name)
+	} else {
+		if len(n.FieldIndex) > 0 {
+			if n.Optional {
+				buf.WriteString("?")
+			}
+			buf.WriteString(".")
+			buf.WriteString(n.Name)
+		} else {
+			c.analyzeCommonExpr(n.Property)
+			buf.WriteString("[")
+			buf.WriteString(n.Property.SubExpr())
+			buf.WriteString("]")
+		}
+	}
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) analyzeCommonSliceNode(n *ast.SliceNode) {
+	buf := strings.Builder{}
+	c.analyzeCommonExpr(n.Node)
+	buf.WriteString(n.Node.SubExpr())
+	buf.WriteString("[")
+	toStr := ""
+	fromStr := ""
+	if n.To != nil {
+		c.analyzeCommonExpr(n.To)
+		toStr = n.To.SubExpr()
+	}
+	if n.From != nil {
+		c.analyzeCommonExpr(n.From)
+		fromStr = n.From.SubExpr()
+	}
+	buf.WriteString(fromStr)
+	buf.WriteString(":")
+	buf.WriteString(toStr)
+	buf.WriteString("]")
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) checkCallNode(n *ast.CallNode) {
+	buf := strings.Builder{}
+	c.analyzeCommonExpr(n.Callee)
+	buf.WriteString(n.Callee.SubExpr())
+	buf.WriteString("(")
+	for i, arg := range n.Arguments {
+		c.analyzeCommonExpr(arg)
+		if i != 0 {
+			buf.WriteString(",")
+		}
+		buf.WriteString(arg.SubExpr())
+	}
+	buf.WriteString(")")
+	n.SetSubExpr(buf.String())
+	c.countCommonExpr(n.SubExpr(), n.Location())
+}
+
+func (c *compiler) analyzeCommonBuiltinNode(n *ast.BuiltinNode) {
+	buf := strings.Builder{}
+	buf.WriteString(n.Name)
+	buf.WriteString("(")
+	for i, arg := range n.Arguments {
+		c.analyzeCommonExpr(arg)
+		if i != 0 {
+			buf.WriteString(",")
+		}
+		buf.WriteString(arg.SubExpr())
+	}
+	buf.WriteString(")")
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) analyzeCommonClosureNode(n *ast.ClosureNode) {
+	c.analyzeCommonExpr(n.Node)
+	// omit '{' / '}'
+	n.SetSubExpr(n.Node.SubExpr())
+}
+
+func (c *compiler) analyzeCommonPointerNode(n *ast.PointerNode) {
+	// do nothing
+	n.SetSubExpr("#")
+}
+
+func (c *compiler) analyzeCommonConditionalNode(n *ast.ConditionalNode) {
+	c.analyzeCommonExpr(n.Cond)
+	c.analyzeCommonExpr(n.Exp1)
+	c.analyzeCommonExpr(n.Exp2)
+	buf := strings.Builder{}
+	buf.WriteString(n.Cond.SubExpr())
+	buf.WriteString(" ? ")
+	buf.WriteString(n.Exp1.SubExpr())
+	buf.WriteString(" : ")
+	buf.WriteString(n.Exp2.SubExpr())
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) analyzeCommonArrayNode(n *ast.ArrayNode) {
+	buf := strings.Builder{}
+	buf.WriteString("[")
+	for i, node := range n.Nodes {
+		c.analyzeCommonExpr(node)
+		if i != 0 {
+			buf.WriteString(",")
+		}
+		buf.WriteString(node.SubExpr())
+	}
+	buf.WriteString("]")
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) analyzeCommonMapNode(n *ast.MapNode) {
+	pairs := make([]*ast.PairNode, 0)
+	for i := range n.Pairs {
+		pair := n.Pairs[i].(*ast.PairNode)
+		c.analyzeCommonExpr(pair.Key)
+		c.analyzeCommonExpr(pair.Value)
+		pairs = append(pairs, pair)
+	}
+	sort.Slice(pairs, func(i, j int) bool {
+		return pairs[i].Key.SubExpr() < pairs[j].Key.SubExpr()
+	})
+	buf := strings.Builder{}
+	buf.WriteString("{")
+	for i, pair := range pairs {
+		if i != 0 {
+			buf.WriteString(",")
+		}
+		buf.WriteString(pair.Key.SubExpr())
+		buf.WriteString(":")
+		buf.WriteString(pair.Value.SubExpr())
+	}
+	buf.WriteString("}")
+	n.SetSubExpr(buf.String())
+}
+
+func (c *compiler) countCommonExpr(subExpr string, loc file.Location) {
+	if c.exprRecords == nil || subExpr == "" {
+		return
+	}
+	hash := fmt.Sprintf("%x", sha1.Sum([]byte(subExpr)))
+	if cs, ok := c.exprRecords[hash]; !ok {
+		c.exprRecords[hash] = &exprRecord{cnt: 1, id: -1}
+	} else {
+		cs.cnt = cs.cnt + 1
+	}
+}
+
+func (c *compiler) needReuseCommon(n ast.Node) (bool, bool, int) {
+	needReuseCommon, isFirstOccur, exprUniqId := false, false, -1
+	if c.exprRecords != nil {
+		expr := n.SubExpr()
+		hash := fmt.Sprintf("%x", sha1.Sum([]byte(expr)))
+		cs, ok := c.exprRecords[hash]
+		if ok && cs.cnt > 1 {
+			if cs.id == -1 {
+				cs.id = c.commonExprInc
+				cs.loc = n.Location()
+				c.commonExpr[cs.id] = expr
+				c.commonExprInc += 1
+			}
+			needReuseCommon = true
+			isFirstOccur = n.Location().Line == cs.loc.Line && n.Location().Column == cs.loc.Column
+			exprUniqId = cs.id
+		}
+	}
+	return needReuseCommon, isFirstOccur, exprUniqId
+}
diff --git a/compiler/analysis_common_test.go b/compiler/analysis_common_test.go
new file mode 100644
index 000000000..0a0c69b8d
--- /dev/null
+++ b/compiler/analysis_common_test.go
@@ -0,0 +1,387 @@
+package compiler_test
+
+import (
+	"testing"
+
+	"github.com/antonmedv/expr"
+	"github.com/antonmedv/expr/vm"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAnalyzeCommonExpr(t *testing.T) {
+	type testCase struct {
+		input   string
+		expr    string
+		program *vm.Program
+	}
+	for _, tt := range []testCase{
+		{
+			input: `(1+1) == 2 and 2 == (1 +   1)`,
+			expr:  `((1 + 1) == 2) and ((1 + 1) == 2)`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpAdd,
+					vm.OpSaveCommon,
+					vm.OpPush,
+					vm.OpEqualInt,
+					vm.OpSaveCommon,
+					vm.OpJumpIfFalse,
+					vm.OpPop,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpAdd,
+					vm.OpSaveCommon,
+					vm.OpEqualInt,
+					vm.OpSaveCommon,
+				},
+				Arguments: []int{
+					0, 0, 0, 1, 1, 0, 0,
+					14, 0,
+					0, 11, 0, 1, 1, 5, 0, 0, 0, 0, 1, 0, 0,
+				},
+			},
+		},
+		{
+			input: `not ((+(1+1)) ** 2 == 4 or 4 == (-(1 +   1)) ^ 2)`,
+			expr:  `not (((-(1 + 1) ** 2) == 4) or ((1 + 1) ** 2) == 4))`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpAdd,
+					vm.OpSaveCommon,
+					vm.OpPush,
+					vm.OpExponent,
+					vm.OpPush,
+					vm.OpEqual,
+					vm.OpJumpIfTrue,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpAdd,
+					vm.OpSaveCommon,
+					vm.OpNegate,
+					vm.OpPush,
+					vm.OpExponent,
+					vm.OpEqual,
+					vm.OpNot,
+				},
+				Arguments: []int{
+					0, 0, 0, 0, 1, 0, 2, 0, 13, 0, 2,
+					0, 5, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+				},
+			},
+		},
+		{
+			input: `nil ==    nil`,
+			expr:  `nil == nil`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpNil,
+					vm.OpNil,
+					vm.OpEqual,
+				},
+				Arguments: []int{0, 0, 0},
+			},
+		},
+		{
+			input: `true && (true || false)`,
+			expr:  `(false or true) and true`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpTrue,
+					vm.OpJumpIfFalse,
+					vm.OpPop,
+					vm.OpTrue,
+					vm.OpJumpIfTrue,
+					vm.OpPop,
+					vm.OpFalse,
+				},
+				Arguments: []int{0, 5, 0, 0, 2, 0, 0},
+			},
+		},
+		{
+			input: `1 >= 2 and 2 < 1`,
+			expr:  `(2 < 1) and (2 < 1)`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpMoreOrEqual,
+					vm.OpSaveCommon,
+					vm.OpJumpIfFalse,
+					vm.OpPop,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpLess,
+					vm.OpSaveCommon,
+				},
+				Arguments: []int{0, 1, 0, 0, 8, 0, 0, 5, 0, 1, 0, 0, 0},
+			},
+		},
+		{
+			input: `1 <= 2 and 2 > 1`,
+			expr:  `(2 > 1) and (2 > 1)`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpLessOrEqual,
+					vm.OpSaveCommon,
+					vm.OpJumpIfFalse,
+					vm.OpPop,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpMore,
+					vm.OpSaveCommon,
+				},
+				Arguments: []int{0, 1, 0, 0, 8, 0, 0, 5, 0, 1, 0, 0, 0},
+			},
+		},
+		{
+			input: `A.B.C.D`,
+			expr:  "A.B.C.D",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpLoadField,
+				},
+				Arguments: []int{0},
+			},
+		},
+		{
+			input: `A?.B.C.D`,
+			expr:  "A?.B.C.D",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpLoadField,
+					vm.OpJumpIfNil,
+					vm.OpFetchField,
+				},
+				Arguments: []int{0, 1, 1},
+			},
+		},
+		{
+			input: `A.B?.C.D`,
+			expr:  "A.B?.C.D",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpLoadField,
+					vm.OpJumpIfNil,
+					vm.OpFetchField,
+				},
+				Arguments: []int{0, 1, 1},
+			},
+		},
+		{
+			input: `A.Map["B"].C.D`,
+			expr:  "A.Map[\"B\"].C.D",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpLoadField,
+					vm.OpPush,
+					vm.OpFetch,
+					vm.OpFetchField,
+				},
+				Arguments: []int{0, 1, 0, 2},
+			},
+		},
+		{
+			input: `A ?? 1`,
+			expr:  "A ?? 1",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpLoadField,
+					vm.OpJumpIfNotNil,
+					vm.OpPop,
+					vm.OpPush,
+				},
+				Arguments: []int{0, 2, 0, 1},
+			},
+		},
+		{
+			input: `int("123") == int("123")`,
+			expr:  `int("123") == int("123")`,
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpBuiltin,
+					vm.OpSaveCommon,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpBuiltin,
+					vm.OpSaveCommon,
+					vm.OpEqualInt,
+				},
+				Arguments: []int{0, 3, 0, 0, 4, 0, 0, 3, 0, 0},
+			},
+		},
+		{
+			input: `true ? 1 : 2`,
+			expr:  "true ? 1 : 2",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpTrue,
+					vm.OpJumpIfFalse,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpJump,
+					vm.OpPop,
+					vm.OpPush,
+				},
+				Arguments: []int{0, 3, 0, 0, 2, 0, 1},
+			},
+		},
+		{
+			input: `[true, true, false, 1.7]`,
+			expr:  `[true,true,false,1.7000000000]`,
+			program: &vm.Program{
+				Constants: []interface{}{1.7, 4},
+				Bytecode: []vm.Opcode{
+					vm.OpTrue,
+					vm.OpTrue,
+					vm.OpFalse,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpArray,
+				},
+				Arguments: []int{0, 0, 0, 0, 1, 0},
+			},
+		},
+		{
+			input: `{1: true, 2: true, 3: false, 4: 1.7}`,
+			expr:  `{"1":true,"2":true,"3":false,"4":1.7000000000}`,
+			program: &vm.Program{
+				Constants: []interface{}{1.7, 4},
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpTrue,
+					vm.OpPush,
+					vm.OpTrue,
+					vm.OpPush,
+					vm.OpFalse,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpMap,
+				},
+				Arguments: []int{0, 0, 1, 0, 2, 0, 3, 4, 5, 0},
+			},
+		},
+		{
+			input: `all([true, false], { # })`,
+			expr:  `all([true,false],#)`,
+			program: &vm.Program{
+				Constants: []interface{}{1.7, 4},
+				Bytecode: []vm.Opcode{
+					vm.OpTrue,
+					vm.OpFalse,
+					vm.OpPush,
+					vm.OpArray,
+					vm.OpBegin,
+					vm.OpJumpIfEnd,
+					vm.OpPointer,
+					vm.OpJumpIfFalse,
+					vm.OpPop,
+					vm.OpIncrementIt,
+					vm.OpJumpBackward,
+					vm.OpTrue,
+					vm.OpEnd,
+				},
+				Arguments: []int{0, 0, 0, 0, 0, 5, 0, 4, 0, 0, 6, 0, 0},
+			},
+		},
+		{
+			input: `any([1+1, 1+1], { # > 1 })`,
+			expr:  `any([1 + 1,1 + 1],# > 1)`,
+			program: &vm.Program{
+				Constants: []interface{}{1.7, 4},
+				Bytecode: []vm.Opcode{
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpAdd,
+					vm.OpSaveCommon,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpPush,
+					vm.OpPush,
+					vm.OpAdd,
+					vm.OpSaveCommon,
+					vm.OpPush,
+					vm.OpArray,
+					vm.OpBegin,
+					vm.OpJumpIfEnd,
+					vm.OpPointer,
+					vm.OpPush,
+					vm.OpMore,
+					vm.OpJumpIfTrue,
+					vm.OpPop,
+					vm.OpIncrementIt,
+					vm.OpJumpBackward,
+					vm.OpFalse,
+					vm.OpEnd,
+				},
+				Arguments: []int{0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 1, 0, 0, 7, 0, 0, 0, 4, 0, 0, 8, 0, 0},
+			},
+		},
+		{
+			input: `(heavyFunc() + tinyFunc1()) + (heavyFunc() + tinyFunc2())`,
+			expr:  "(heavyFunc() + tinyFunc1()) + (heavyFunc() + tinyFunc2())",
+			program: &vm.Program{
+				Bytecode: []vm.Opcode{
+					vm.OpCall0,
+					vm.OpSaveCommon,
+					vm.OpCall0,
+					vm.OpAdd,
+					vm.OpLoadCommon,
+					vm.OpJumpIfSaveCommon,
+					vm.OpPop,
+					vm.OpCall0,
+					vm.OpSaveCommon,
+					vm.OpCall0,
+					vm.OpAdd,
+					vm.OpAdd,
+				},
+				Arguments: []int{0, 0, 1, 0, 0, 3, 0, 0, 0, 2, 0, 0},
+			},
+		},
+	} {
+		t.Run(tt.input, func(t *testing.T) {
+			program, err := expr.Compile(tt.input, expr.Env(Env{}),
+				expr.Function("heavyFunc", func(...interface{}) (interface{}, error) { return nil, nil }),
+				expr.Function("tinyFunc1", func(...interface{}) (interface{}, error) { return nil, nil }),
+				expr.Function("tinyFunc2", func(...interface{}) (interface{}, error) { return nil, nil }),
+				expr.Optimize(false), expr.AllowReuseCommon(true))
+			if err != nil {
+				assert.Nil(t, err)
+			} else {
+				assert.Equal(t, tt.expr, program.Node.SubExpr())
+				assert.Equal(t, tt.program.Bytecode, program.Bytecode)
+				assert.Equal(t, tt.program.Arguments, program.Arguments)
+			}
+
+		})
+	}
+
+}
diff --git a/compiler/compiler.go b/compiler/compiler.go
index 423dd6217..85cfb0c8e 100644
--- a/compiler/compiler.go
+++ b/compiler/compiler.go
@@ -32,6 +32,15 @@ func Compile(tree *parser.Tree, config *conf.Config) (program *Program, err erro
 	if config != nil {
 		c.mapEnv = config.MapEnv
 		c.cast = config.Expect
+		if config.AllowReuseCommon {
+			c.commonExprInc = 0
+			c.commonExpr = make(map[int]string)
+			c.exprRecords = make(map[string]*exprRecord)
+			c.analyzeCommonExpr(tree.Node)
+			defer func() {
+				program.CommonExpr = c.commonExpr
+			}()
+		}
 	}
 
 	c.compile(tree.Node)
@@ -69,6 +78,16 @@ type compiler struct {
 	nodes          []ast.Node
 	chains         [][]int
 	arguments      []int
+
+	commonExpr    map[int]string         // exprUniqId => expr string
+	exprRecords   map[string]*exprRecord // record sub expr cache count, hash(expr string) => exprRecord
+	commonExprInc int                    // common expr increment number id, increment exprUniqId
+}
+
+type exprRecord struct {
+	id  int           // sub-expr  uniq id
+	loc file.Location // first location of sub-expr
+	cnt int           // how many times of sub-expr repeated
 }
 
 func (c *compiler) emitLocation(loc file.Location, op Opcode, arg int) int {
@@ -289,7 +308,6 @@ func (c *compiler) ConstantNode(node *ast.ConstantNode) {
 
 func (c *compiler) UnaryNode(node *ast.UnaryNode) {
 	c.compile(node.Node)
-
 	switch node.Operator {
 
 	case "!", "not":
@@ -307,9 +325,25 @@ func (c *compiler) UnaryNode(node *ast.UnaryNode) {
 }
 
 func (c *compiler) BinaryNode(node *ast.BinaryNode) {
+	// if first occur, the result must not be computed before
+	// otherwise, the result need to check save before reuse result of common
+	if needReuseCommon, isFirstOccur, exprUniqId := c.needReuseCommon(node); needReuseCommon {
+		var cEnd int
+		if !isFirstOccur {
+			c.emit(OpLoadCommon, exprUniqId)
+			cEnd = c.emit(OpJumpIfSaveCommon, placeholder)
+			c.emit(OpPop)
+		}
+		defer func() {
+			c.emit(OpSaveCommon, exprUniqId)
+			if !isFirstOccur {
+				c.patchJump(cEnd)
+			}
+		}()
+	}
+
 	l := kind(node.Left)
 	r := kind(node.Right)
-
 	switch node.Operator {
 	case "==":
 		c.compile(node.Left)
@@ -326,7 +360,13 @@ func (c *compiler) BinaryNode(node *ast.BinaryNode) {
 	case "!=":
 		c.compile(node.Left)
 		c.compile(node.Right)
-		c.emit(OpEqual)
+		if l == r && l == reflect.Int {
+			c.emit(OpEqualInt)
+		} else if l == r && l == reflect.String {
+			c.emit(OpEqualString)
+		} else {
+			c.emit(OpEqual)
+		}
 		c.emit(OpNot)
 
 	case "or", "||":
@@ -534,6 +574,23 @@ func (c *compiler) SliceNode(node *ast.SliceNode) {
 }
 
 func (c *compiler) CallNode(node *ast.CallNode) {
+	// if first occur, the result must not be computed before
+	// otherwise, the result need to check save before reuse result of common
+	if needReuseCommon, isFirstOccur, exprUniqId := c.needReuseCommon(node); needReuseCommon {
+		var cEnd int
+		if !isFirstOccur {
+			c.emit(OpLoadCommon, exprUniqId)
+			cEnd = c.emit(OpJumpIfSaveCommon, placeholder)
+			c.emit(OpPop)
+		}
+		defer func() {
+			c.emit(OpSaveCommon, exprUniqId)
+			if !isFirstOccur {
+				c.patchJump(cEnd)
+			}
+		}()
+	}
+
 	for _, arg := range node.Arguments {
 		c.compile(arg)
 	}
diff --git a/conf/config.go b/conf/config.go
index 1ac0fa7d2..f50fb1db5 100644
--- a/conf/config.go
+++ b/conf/config.go
@@ -21,6 +21,8 @@ type Config struct {
 	ConstFns    map[string]reflect.Value
 	Visitors    []ast.Visitor
 	Functions   map[string]*builtin.Function
+
+	AllowReuseCommon bool // allow cache common sub-expr computed result, aimed to reuse already computed result
 }
 
 // CreateNew creates new config with default values.
diff --git a/expr.go b/expr.go
index 6aa674fb5..17ef9a4c3 100644
--- a/expr.go
+++ b/expr.go
@@ -123,6 +123,13 @@ func Function(name string, fn func(params ...interface{}) (interface{}, error),
 	}
 }
 
+// AllowCacheCommon allow cache common sub-expr computed result, aimed to reuse already computed result
+func AllowReuseCommon(allow bool) Option {
+	return func(c *conf.Config) {
+		c.AllowReuseCommon = allow
+	}
+}
+
 // Compile parses and compiles given input expression to bytecode program.
 func Compile(input string, ops ...Option) (*vm.Program, error) {
 	config := conf.CreateNew()
diff --git a/parser/lexer/lexer.go b/parser/lexer/lexer.go
index cfb1e8c61..8cda245c8 100644
--- a/parser/lexer/lexer.go
+++ b/parser/lexer/lexer.go
@@ -219,3 +219,16 @@ func (l *lexer) scanString(quote rune) (n int) {
 	}
 	return
 }
+
+func (l *lexer) scanRawString(quote rune) (n int) {
+	ch := l.next() // read character after quote
+	for ch != quote {
+		if ch == eof {
+			l.error("literal not terminated")
+			return
+		}
+		ch = l.next()
+		n++
+	}
+	return
+}
diff --git a/parser/lexer/state.go b/parser/lexer/state.go
index 1212aa321..19783e834 100644
--- a/parser/lexer/state.go
+++ b/parser/lexer/state.go
@@ -1,6 +1,7 @@
 package lexer
 
 import (
+	"strconv"
 	"strings"
 )
 
@@ -21,6 +22,14 @@ func root(l *lexer) stateFn {
 			l.error("%v", err)
 		}
 		l.emitValue(String, str)
+	case r == '`': // raw string case
+		l.scanRawString(r)
+		n := len(l.word())
+		str, err := unescape(strconv.Quote(l.word()[1 : n-1]))
+		if err != nil {
+			l.error("%v", err)
+		}
+		l.emitValue(String, str)
 	case '0' <= r && r <= '9':
 		l.backup()
 		return number
diff --git a/parser/parser_test.go b/parser/parser_test.go
index a93ecdc2f..707c4389d 100644
--- a/parser/parser_test.go
+++ b/parser/parser_test.go
@@ -444,6 +444,24 @@ func TestParse(t *testing.T) {
 				Left:  &IdentifierNode{Value: "foo"},
 				Right: &CallNode{Callee: &IdentifierNode{Value: "bar"}}},
 		},
+		{
+			"`" + `foo\n\rbar\\` + "`",
+			&StringNode{Value: `foo\n\rbar\\`},
+		},
+		{
+			"`" + `foo\
+\n` + "`",
+			&StringNode{Value: "foo\\\n\\n"},
+		},
+		{
+			"`foo\\n\\rbar\\\\`", // because quoted by ", must add '\' to '\'
+			&StringNode{Value: `foo\n\rbar\\`},
+		},
+		{
+			"\"" + `foo\nbar\\` + "\"",
+			&StringNode{Value: `foo
+bar\`},
+		},
 	}
 	for _, test := range parseTests {
 		actual, err := parser.Parse(test.input)
@@ -538,6 +556,15 @@ func TestParse_error(t *testing.T) {
 	}
 }
 
+func TestParseRawString_error(t *testing.T) {
+	_, err := parser.Parse("`foo")
+	if err == nil {
+		t.Errorf("expect to get error")
+	} else {
+		t.Logf("got err: %+v", err)
+	}
+}
+
 func TestParse_optional_chaining(t *testing.T) {
 	parseTests := []struct {
 		input    string
diff --git a/vm/opcodes.go b/vm/opcodes.go
index 4bc9abf4d..cb61d29bb 100644
--- a/vm/opcodes.go
+++ b/vm/opcodes.go
@@ -29,6 +29,7 @@ const (
 	OpJumpIfFalse
 	OpJumpIfNil
 	OpJumpIfNotNil
+	OpJumpIfSaveCommon // if common value save skip common calculate
 	OpJumpIfEnd
 	OpJumpBackward
 	OpIn
@@ -68,6 +69,8 @@ const (
 	OpGetCount
 	OpGetLen
 	OpPointer
+	OpSaveCommon // save common sub-expr value
+	OpLoadCommon // load common sub-expr value
 	OpBegin
 	OpEnd // This opcode must be at the end of this list.
 )
diff --git a/vm/program.go b/vm/program.go
index 936eca9a2..542d13f13 100644
--- a/vm/program.go
+++ b/vm/program.go
@@ -15,13 +15,14 @@ import (
 )
 
 type Program struct {
-	Node      ast.Node
-	Source    *file.Source
-	Locations []file.Location
-	Constants []interface{}
-	Bytecode  []Opcode
-	Arguments []int
-	Functions []Function
+	Node       ast.Node
+	Source     *file.Source
+	Locations  []file.Location
+	Constants  []interface{}
+	Bytecode   []Opcode
+	Arguments  []int
+	Functions  []Function
+	CommonExpr map[int]string
 }
 
 func (program *Program) Disassemble() string {
@@ -46,6 +47,9 @@ func (program *Program) Disassemble() string {
 		argument := func(label string) {
 			_, _ = fmt.Fprintf(w, "%v\t%v\t<%v>\n", pp, label, arg)
 		}
+		commonExpr := func(label string) {
+			_, _ = fmt.Fprintf(w, "%v\t%v\t<%v>\t(%s)\n", pp, label, arg, program.CommonExpr[arg])
+		}
 		constant := func(label string) {
 			var c interface{}
 			if arg < len(program.Constants) {
@@ -151,6 +155,9 @@ func (program *Program) Disassemble() string {
 		case OpJumpIfNotNil:
 			jump("OpJumpIfNotNil")
 
+		case OpJumpIfSaveCommon:
+			jump("OpJumpIfSaveCommon")
+
 		case OpJumpIfEnd:
 			jump("OpJumpIfEnd")
 
@@ -269,6 +276,12 @@ func (program *Program) Disassemble() string {
 		case OpPointer:
 			code("OpPointer")
 
+		case OpSaveCommon:
+			commonExpr("OpSaveCommon")
+
+		case OpLoadCommon:
+			commonExpr("OpLoadCommon")
+
 		case OpBegin:
 			code("OpBegin")
 
diff --git a/vm/vm.go b/vm/vm.go
index ec22c251d..9b96b03ac 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -16,6 +16,11 @@ import (
 var MemoryBudget int = 1e6
 var errorType = reflect.TypeOf((*error)(nil)).Elem()
 
+// just for expr not save common result
+type notSave struct{}
+
+var _notSave = &notSave{}
+
 type Function = func(params ...interface{}) (interface{}, error)
 
 func Run(program *Program, env interface{}) (interface{}, error) {
@@ -48,8 +53,8 @@ type Scope struct {
 func Debug() *VM {
 	vm := &VM{
 		debug: true,
-		step:  make(chan struct{}, 0),
-		curr:  make(chan int, 0),
+		step:  make(chan struct{}),
+		curr:  make(chan int),
 	}
 	return vm
 }
@@ -67,17 +72,18 @@ func (vm *VM) Run(program *Program, env interface{}) (_ interface{}, err error)
 			err = f.Bind(program.Source)
 		}
 	}()
-
 	if vm.stack == nil {
-		vm.stack = make([]interface{}, 0, 2)
+		vm.stack = make([]interface{}, 0, 64)
 	} else {
 		vm.stack = vm.stack[0:0]
 	}
-
 	if vm.scopes != nil {
 		vm.scopes = vm.scopes[0:0]
 	}
-
+	commonCache := make([]interface{}, len(program.CommonExpr))
+	for i := 0; i < len(commonCache); i++ {
+		commonCache[i] = _notSave
+	}
 	vm.memoryBudget = MemoryBudget
 	vm.memory = 0
 	vm.ip = 0
@@ -90,7 +96,6 @@ func (vm *VM) Run(program *Program, env interface{}) (_ interface{}, err error)
 		op := program.Bytecode[vm.ip]
 		arg := program.Arguments[vm.ip]
 		vm.ip += 1
-
 		switch op {
 
 		case OpInvalid:
@@ -143,12 +148,12 @@ func (vm *VM) Run(program *Program, env interface{}) (_ interface{}, err error)
 			vm.push(nil)
 
 		case OpNegate:
-			v := runtime.Negate(vm.pop())
-			vm.push(v)
+			a := vm.pop()
+			vm.push(runtime.Negate(a))
 
 		case OpNot:
-			v := vm.pop().(bool)
-			vm.push(!v)
+			a := vm.pop().(bool)
+			vm.push(!a)
 
 		case OpEqual:
 			b := vm.pop()
@@ -188,6 +193,11 @@ func (vm *VM) Run(program *Program, env interface{}) (_ interface{}, err error)
 				vm.ip += arg
 			}
 
+		case OpJumpIfSaveCommon:
+			if _, ok := vm.current().(*notSave); !ok {
+				vm.ip += arg
+			}
+
 		case OpJumpIfEnd:
 			scope := vm.Scope()
 			if scope.It >= scope.Len {
@@ -445,6 +455,12 @@ func (vm *VM) Run(program *Program, env interface{}) (_ interface{}, err error)
 			scope := vm.Scope()
 			vm.push(scope.Array.Index(scope.It).Interface())
 
+		case OpSaveCommon:
+			commonCache[arg] = vm.current()
+
+		case OpLoadCommon:
+			vm.push(commonCache[arg])
+
 		case OpBegin:
 			a := vm.pop()
 			array := reflect.ValueOf(a)