about 12517 garibrath from kolkata to guwahati i found a literature like "3AC Coach consists of 9 berths in the first compartment and the sequence follows in the others. It is a 78 berth Coach. So the last compartment shall have 6 berths; i.e. 3 in the Main Compartment and 3 in the Side bay." can anybody clarify this? is there SM berth in this train?? pls help.