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