Stations on IR with Single letter station codes:
There are only Seven such stations in IR.
SWR:Three stations::Two stations ie,Srirangapattana-S and Yeliyur- Y ,both on Mysore -Bangalore line and Venkatagiri Kote Halt-H(near SBC)
SCR: Jalna-J
SECR-...
more... Raipur-R
SECR: Gondia -G
ER: Deula- D