Program ignores this line. Second line: #rows, #columns, optional delay, optional map cell size. Other lines: C-road crossing, B-block of houses, R-road going right, L-road going left, U-road going up, D-road going down, S-starting location, E-destination
5 5 
B B S B B
L C C C C
B D B U D
B C R C B 
B C R R E