[begin]
1 0
2 3
3 0
4 3
5 -3
[end]
[begin]
1 3
2 4
3 0
4 7
5 -1
[end]
[begin]
1 9
2 10
3 0
4 19
5 -1
[end]
[begin]
1 3
2 7
3 0
4 10
5 -4
[end]
[begin]
1 3
2 9
3 1
4 12
5 -6
[end]
