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