Summary答案

U1 ADBCA BCDAB BCCAD DBCAD

U2 DCABB ACADC BADDB ACBCB

U3 BCADB ACDBA BCDAD ABADD

U4 DABCA BDADB DADAC BADCA

U5 DBACB DACBC DADBC ADCAC

U6 BACBA ADDCB CBCAD ABACD

U7 CBADA CDCCB ADBDA CADBB

U8 BDADC ABBCD ACABD CBACD

U9 ACBBC DBADC ADDAB CABDC

U10 CBADA CDCBA BDDAB CABCB。