ma
0 !
* 1 2
1 a
* 2 1
2 !
* 0 1
* 3 4
* 4 8
3 a
* 2 0.5
* 3 0.5
4 a
* 3 1
4 b
* 1 0.5
* 5 0.5
5 a
* 5 1
