611292
U=AE+AE=U+=U-
1-5:BABAB
6-10:ACCCA
11-15:错错对对对
16-20:错对错错对
1-5:CACCA
6-10:错错错错对
11-15:正错错正正
1-5:ABCBC
6-10:ABCBC
11-15:对错错错错
16-20:错对对对错
1-5:BBAAD
6-10:DCBBA
11-15:对错错错错
16-20:对对错对错
1-5:BBBBD
6-10:BBCBB
11-15:正错对错错
16-20:正错错对错
R=R1\N
I=U-R