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