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

3 0 9  0 0 7  0 0 0
0 0 1  0 0 0  9 0 0
0 0 0  8 0 0  7 0 6

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