railfans of vaigai plsss reply i am travelling in this train at the month of july in 2s coach,,,,i know there is 2 type of 2s coaches,,1.seat with opposite to each other,,,2.chair like seat that faces front and before seat also faces front back to back seat(similar to ac cc),,,,,i prefer seat like no .2 that faces back to back,,,somene plsss explain how will be the D7 coach of vaigai??