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