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