But if we can see 12137/8 Punjab Mail gets Best Loco End to End FZR - NDLS BGKT WDPB; NDLS - IGP GZB WAP4/7; IGP - CSTM KYN WCAM3 but 19023/4 FZR BCT Janta Express gets FZR - NDLS LDH WDG3A NDLS - BCT GZB WAP1/4/5/7. How strange system for both the trains.