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