[begin]
1 5
2 7
3 1
4 12
5 -2
[end]
[begin]
1 8
2 6
3 0
4 14
5 2
[end]
[begin]
1 7
2 6
3 1
4 13
5 1
[end]
[begin]
1 1
2 7
3 1
4 8
5 -6
[end]
