0 2 6 0 0 0 0 3
2 0 0 0 4 0 0 1
6 0 0 0 3 0 0 2
0 0 0 0 0 0 0 0
0 4 3 0 0 0 0 0
0 0 0 0 0 0 7 0
0 0 0 0 0 7 0 0
3 1 2 0 0 0 0 0