621007
CAACA
AAAAC
错对对错错
1-5BABAB
6-10BBBAB
11ACD
12AC
13CD
14ABCDEF
15ABCD
16BCD
17ABCD
18ABCD
19ABCDEF
20ABC
21对错错错错
BABBAA
BCD
ABCD
对对错对错
BBAAB
BBBBB
BBBAA
1-5ACBCB
6-10CCCCC
11-15BCACC