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

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

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