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

0 0 0  6 0 0  0 8 0
0 3 9  0 0 0  5 0 0
5 0 0  0 0 0  9 0 2

0 0 0  0 0 0  0 0 0
0 0 0  9 7 0  2 5 0
1 0 0  0 5 0  0 7 0
