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