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