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