4 9
8 - 7,8,9
8-10 - 3,4,5,6,7,8
7-8 - 1,2,4,5
0 ab 1,2,3,6,9
4 10
1 - 7,8,9,10
2 - 3,4,5,6,7,8
3 - 1,2,4,5
0 ab 1,2,3,6,9,10