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