[begin]
1 8
2 3
3 1
4 11
5 5
[end]
[begin]
1 7
2 8
3 0
4 15
5 -1
[end]
[begin]
1 0
2 4
3 0
4 4
5 -4
[end]
[begin]
1 4
2 6
3 1
4 10
5 -2
[end]
[begin]
1 6
2 0
3 1
4 6
5 6
[end]
