1 2 3  4 5 6  7 8 9
7 8 9  1 2 3  4 5 6
4 5 6  7 8 9  1 2 3

5 6 7  8 9 1  2 3 4
0 0 0  0 0 0  0 0 0
0 0 0  0 0 0  0 0 0

0 0 0  0 0 0  0 0 0
0 0 0  0 0 0  0 0 0
0 0 0  0 0 0  0 0 0
