Can be used as alternative,
14212 can be replaced by mewar, GT if that have been rescheduled.
Current resorvation counter can provide tickets upto mathura or passengers can be travel ingeneral coaches too as both trains started from source.
Same chain can be used for going to Gorakhpur,Kanpur too
18733/Σ NDLS to Lucknow triweakly alternative chain ΣChain