参考答案
1-5 ADDDA
6-10 ACDCD
11-15 DDCBD
16-20 ACBAC
21-25 BAFBA
26-30 CDEAF
31-35 ACDBD
36-40 CDCDB
41-45 CABDB
46-50 DCABE
51-55 BCADD
56-60 ACBAB
61-65 CDDAB