Originally Posted by Sam Bee

TLL HEL 1725 1800 AY 114
Y4 B4 H3 K2 MC PC TC LC VC SC NC QC OC ZC RC G1 WC X0 E0

HEL LHR 1930 2040 AY3125
J4 C4 D4 I3 Y7 B7 H7 K7 M7 P7 TC L7 VC SC NC QC OC ZC RC G4 WC X0 E0

Or - if you are checking as married segments, it's different:

TLL HEL 1725 1800 AY 114 Y4 B4 H4 K4 M4 P3 T1 LC VC SC NC
QC OC ZC RC G0 WC X0 E0
LHR 1930 2040 AY3125 J4 C3 D3 I2 Y4 B4 H4 K4 M4 P3 T1
LC VC SC NC QC OC ZC RC G0 WC X0
E0