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

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

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