Complex quecchen.
Should be SLB in 75 berth or 78 berth coach.
If its 81, no idea.
so the chances are more for SLB next to the door.
P.S : dont stretch the head or Legs as the wall next to the door doesn't have any rubber bush :P

If this has 78 Berths per coach, then here's the layout

LB or SLB --- nothing else then this.

Thanks Pradyu---
will pass your P.S. to the passenger who is going to travel....may find useful..

SLB.
This coach has 78 berths with 3 berths in the first compartment and 3 in the side bay. (1,2,3 and then 4,5,6)
After this regular arrangement of (3+3)+3 follows.
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The same arrangement can also be found in the 75 berth coaches. However those have been nearly phased out and are rarely visible.

in the pic above the coach is 72 berth --- 2 stores at extremes of the bay.
if 72 berth --- then SLB next to door
if 75 berth --- LB / SLB next to door
if 78 berth --- LB
if 81 berth --- LB
PS: in worst case --- it will be a SLB next to door. and best possibility is it can be a LB --- JACKPOT!

Thanks Dip---U r right.
It is SLB

STR = Storage