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

0 2 9  0 0 0  0 8 1
0 0 0  4 9 0  2 0 0
8 0 0  3 0 0  0 0 0

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