aaaa aaab aaac aaam aaar aaba aabb aabc aabm aaca aacb aacc aacm aacr aama aamb aamc aamr aara aarc aarm abaa abab abac abam abar abb- abba abbb abbr abca abcb abcc abcr abma abmb abmc abra abrc acaa acab acac acar acba acca accc accm acma acmc acr- acra acrc acrm acrr amaa amac amam amar amb- amba ambr amca amcc amm- amma amra amrc arab arac aram arar arba arc- arca arcm arma armc armm arr- arra arrc arrr baaa baam baar baba babb babm babr bac- baca bacc bama bamb bamc bamm bar- bara barb barc barm barr bbbb bbcm bbrc bcaa bcam bcar bcbc bcca bccc bccm bcma bcra bmaa brab brac bram brca brcb brmc brrm brrr caaa caab caac caam caba cac- caca cacc cacm cacr cama camb camc camm cara carb carc carm carr cbac cbar cbbc cbca cbcc cbcm cbcr cbrm ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm ccma ccmb ccmc ccmm ccra ccrc cmaa cmac cmba cmbc cmcc cmmb cmmc cmra cmrr crab crac cram crar crbc crca crcc crcr crmb maaa maac maam maar maba mac- maca macb macc macr mama mamc mar- mara marc marm marr mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcmc mcrc mmaa mmab mmac mmar mmcc mmcm mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrmc mrrc raab raam raba rabb rac- raca racc rama ramb ramm rara rarb rbbb rbbr rcac rcbc rccb rccc rrmc rrrr