10 10
 0  0  0  0  0  0  0  0  0  0
 0 -1 -1 -1 -1 -1 -1 -1  0 -1
 0 -1  0  0  0  0  0 -1  0 -1
 0 -1  0 -1  0 -1  0 -1  0 -1
 0 -1  0 -1  0 -1  0 -1  0 -1
 0 -1  0  0 -5 -1  0 -1  0 -1
 0  0  0 -1 -1  0  0 -1  0  0
 0  0  0 -1  0  0 -1  0  0  0
-1 -1  0 -1  0  0  0  0 -1  0
 0  0  0  0  0  0  0  0 -1  0