Trains that I know
56214 TPTY - CMNR passenger
58501 VSKP - KRDL Passenger
12695 Chennai - TVC SF Exp
And we have 1217 PNR entries in FC class...So you can have a go through...
more... of all of them to find other trains like Pandiyan Exp, Maveli Exp, Alleppy Express, etc...
/pnr