621024
BBAB ADDA
DABC AABA DC
AAB
ACBD
B D
11B 12C
k&k
wo
kkkkkkkkff
1C2A5A6A
7A
1113错
1B2B3A4A5C6C7D8B9C10D11D12C13B14A15A
1C 5A6A8A9D10C
12对13对
2A3D5D7C9A8D10B
11B 12BD 13AB 14 15 16A 17 20D
2126对
1A3B 5B
6C 7D8C10
11B13A 14C 15D