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