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