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