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