5
2
2 2
3
0 0
1 1
0 1
4
1 1 1 1
7
0 0
0 1
0 2
0 3
1 3
2 3
3 3
3
1 2 1
4
1 1
0 1
1 2
0 2
4
2 2 2 2
6
0 1
0 1
1 2
1 2
2 3
2 3
5
1 2 2 3 3
12
1 4
2 3
0 2
2 4
1 1
3 4
1 3
0 1
3 3
2 4
0 3
4 4