Following stations has unique station codes of double alphabet of same character:-
Please advise additions/deletions/modifications.
AA Ataria
CC Chauri Chaura
DD Daund
EE Eluru...
more...
GG Gandhigram
JJ Jajau
KK Khadki
MM Mumbai Mahim
NN Nandura
PP Puranpur
RR Richha Road
SS Shirsoli
TT Titte
V.V Valivade
WW Wanabar