621005
1 A
2 C
3 B
4 D
5 DX B
6 BX C
7 D
8 BX A
9 D
10 DX A
11 AX B
12 AX C
13 BX A
14 BX A
15 AX D
1 13
3 5 11
2 6 8 10 12