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