0 7 0  0 0 0  1 0 0
0 0 3  0 0 0  0 0 0
0 0 0  0 6 0  0 0 9

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

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