8 12
 3 0 0 0 1 0 0 0 0 0 0 0
 0 2 0 0 0 0 0 0 4 0 0 0
 4 0 2 0 0 0 0 0 0 0 1 0
 4 1 0 2 0 0 0 0 0 0 0 0
 0 0 0 0 4 0 0 0 0 3 0 0
 0 0 0 0 0 3 0 2 0 0 0 2
 0 0 0 0 0 3 0 0 0 0 0 0
 0 0 0 0 0 0 3 0 0 0 0 0