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