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