RSA & hence LSA too happens same way!! Purvanchal (via SV) whch comes GKP dnt always return via same Electric route!!
Once Electric route incoming Rake has to return via non-electric route while once a week Non-Electric Route Rake return via Electric route (for 4 days run of this Purvanchal via SV)!!
Sooner sme other way would b defined to find Loco combo for the same!!