testing map from maze-simple.txt
.XXXXXXXXXXXXXXXXXX.
X..................X
X..................X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X....f.............X
X..................X
X......S...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake changes direction to UP
.XXXXXXXXXXXXXXXXXX.
X..................X
X..................X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X....f.............X
X......S...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

.XXXXXXXXXXXXXXXXXX.
X..................X
X..................X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X....f.S...........X
X......s...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake changes direction to LEFT
.XXXXXXXXXXXXXXXXXX.
X..................X
X..................X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X....fSs...........X
X......s...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake eats food
.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X....Sss...........X
X......s...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X...Ssss...........X
X......s...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..Sssss...........X
X......s...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake changes direction to DOWN
.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..sssss...........X
X..S...s...........X
X......s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..sssss...........X
X..s...s...........X
X..S...s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

testing map from maze-cross.txt
XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX........X
X........XX........X
X........XX........X
X........XX...f....X
X........XX........X
X........XX.......SX
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

snake changes direction to LEFT
XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX........X
X........XX........X
X........XX........X
X........XX...f....X
X........XX........X
X........XX......SsX
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX........X
X........XX........X
X........XX........X
X........XX...f....X
X........XX........X
X........XX.....SssX
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX........X
X........XX........X
X........XX........X
X........XX...f....X
X........XX........X
X........XX....SsssX
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX........X
X........XX........X
X........XX........X
X........XX...f....X
X........XX........X
X........XX...SssssX
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

snake changes direction to UP
XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX........X
X........XX........X
X........XX........X
X........XX...f....X
X........XX...S....X
X........XX...ssss.X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

snake eats food
XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX......f.X
X........XX........X
X........XX........X
X........XX...S....X
X........XX...s....X
X........XX...sss..X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX......f.X
X........XX........X
X........XX...S....X
X........XX...s....X
X........XX...s....X
X........XX...sss..X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX......f.X
X........XX...S....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...sss..X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX...S..f.X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...sss..X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

snake changes direction to LEFT
XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX..Ss..f.X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...sss..X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XX.Sss..f.X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...sss..X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XXSsss..f.X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...ss...X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

snake collides with wall
XXXXXXXXXXXXXXXXXXXX
X..................X
X..................X
X........XSssss..f.X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X........XX...s....X
X..XXXXXXXXXXXXXX..X
X..XXXXXXXXXXXXXX..X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X........XX........X
X..................X
X..................X
XXXXXXXXXXXXXXXXXXXX

resume testing map from maze-simple.txt
.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..sssss...........X
X..s...s...........X
X..S...s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake changes direction to RIGHT
.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..sssss...........X
X..s...s...........X
X..sS..s...........X
X..................X
.XXXXXXXXXXXXXXXXXX.

.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..sssss...........X
X..s...s...........X
X..ssS.............X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake changes direction to UP
.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..sssss...........X
X..s.S.............X
X..sss.............X
X..................X
.XXXXXXXXXXXXXXXXXX.

snake collides with self
.XXXXXXXXXXXXXXXXXX.
X..................X
X.............f....X
X..................X
X..................X
X...XXXXXXXXXXXX...X
X..ssSs............X
X..s.s.............X
X..sss.............X
X..................X
.XXXXXXXXXXXXXXXXXX.