✔ 最佳答案
2000 EACEB BCBDA EBAAC CEAAE ECDDB CDDAD BBAAD CEDEB CDCAE CBBDA BECD
2001 ACAEB DABDE BBEAC CACEC CACDB ADECB EBEDB AEACB DDBED DADAB DEEC
2002 DBADB AADDB CCDAA ABCDA CABCB DBBBD ACABC CDDBC CBCDC AADBB ABDC
2003 CCAAC ADDCD BDDAD DBBAC CBBBC BACAA ABBCD CBCDA CCDDB BAADC BADB
2004 CACAC CDDAB BBCCB ACDBC BDBDC ABDDA BABBA CDDAB CCDAA AADDA BDCC
2005 BDADB DDCAD BDCCD BDCBC CCBCA CBCCD ACDAD ADADA CABAA BBBAB BCBA
2006 BCAAA BADAB CCDDC AABCA DDCBD DCCDA DBCBC BBACB CDAAC BBDDA CBBD
2007 ADAAD BBDAB DDABC AABAD DDBDC BDBCC DAACB CCDBA ACBCC DBAAC CCBD
2008 BAABC CCDAA CACDC BCCCC DCAAA DBDBC DDBDA ADCAA BBBBB BBDDA BDDA
2009 BDDAA ABDBC BCCDD ABBAC DBBCD AACAD BADCC CDCDD ABAAB CBBCC BDCA
2010 CBDBD CDACD BDADB ABCCA BDABA CCDBC DBCAA ACACD ACBCB BDDBC ADAB