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

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

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