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