4 2 7 0 0 0 6 5 3
0 1 0 0 0 0 0 0 0
0 0 6 7 0 0 1 2 8
0 0 0 0 0 0 0 0 0
0 0 4 0 0 0 0 0 2
0 0 3 0 2 0 0 0 0
2 0 0 0 0 0 7 0 0
3 0 9 0 7 1 8 0 0
0 0 0 5 0 6 2 0 0