9 0 0  1 0 4  0 0 2
0 8 0  0 6 0  0 7 0
0 0 0  0 0 0  0 0 0

4 0 0  0 0 0  0 0 1
0 7 0  0 0 0  0 3 0
3 0 0  0 0 0  0 0 7

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