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