Linear Chess

Given two strings, start and target. Is it possible to reach target from start given the conditions.

1. String can contain "L", "R" or "_".
2. L denotes a left pawn which can move only in left direction, R denotes a right pawn which can move only in right direction.
3. Pawns can't capture or jump over other pawns.

Example :
start = "__LL_"
target = "L_L__"
output - True