aaaa aaab aaac aaam aaar aaba aabb aabc aabm aabt aaca aacb aacc aacm aacr aact aama aamb aamc aamr aara aarc aarm aart aata aatc aatt abaa abab abac abam abar abat abb- abba abbb abbr abbt abca abcb abcc abcr abct abma abmb abmc abmt abra abrc abta ac-t acaa acab acac acar acat acba acca accc accm acct acma acmc acr- acra acrc acrm acrr acta actc actt amaa amac amam amar amat amb- amba ambr amca amcc amm- amma amra amrc amta amtc arab arac aram arar arat arba arc- arca arcm arct arma armc armm armt arr- arra arrc arrr arrt arta artc artr at-t ataa atab atac atar atat atca atcc atcr atm- atma atra atrc atrm atta attr baaa baam baar baat baba babb babm babr bac- baca bacc bact bama bamb bamc bamm bar- bara barb barc barm barr bart bata batc batt bbbb bbcm bbrc bcaa bcam bcar bcat bcbc bcca bccc bccm bcma bcra bctc bmaa bmtc brab brac bram brat brca brcb brmc brrm brrr brtc btaa btcc btrc btrt bttb caaa caab caac caam caat caba cac- caca cacc cacm cacr cama camb camc camm camt cara carb carc carm carr cart cat- cata catb catc catm catt cbac cbar cbat cbbc cbca cbcc cbcm cbcr cbct cbrm cbrt cbta cbtc ccaa ccab ccac ccam ccar ccat ccba ccbc ccca cccb cccc cccm ccma ccmb ccmc ccmm ccra ccrc ccrt cctb cctc cctt cmaa cmac cmba cmbc cmcc cmmb cmmc cmra cmrr cmta cmtc crab crac cram crar crat crbc crca crcc crcr crmb crrt crtc crtm ctab ctba ctca ctma ctrc ctrm ctta maaa maac maam maar maat maba mac- maca macb macc macr mact mama mamc mar- mara marc marm marr mart mata matc matr matt mbac mbam mbba mbca mbta mcaa mcac mcat mcba mcbc mcca mccc mcmc mcmt mcrc mctc mmaa mmab mmac mmar mmcc mmcm mmct mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrmc mrrc mrta mrtm mrtt mtaa mtab mtac mtbc mtcr mtrc mtrr mttr raab raam raat raba rabb rac- raca racc ract rama ramb ramm rara rarb rata ratt rbbb rbbr rcac rcbc rccb rccc rctc rrat rrmc rrrr rtca rtcc rtcm rtmc taa- taar taat taba tabb tabc taca tacc tact tama tamc tamm tara tarb tarc tarm tarr tart tata tatb tatr tatt tbar tbca tbcb tbcc tbrb tbta tcam tcca tccc tctc tmaa tmac tmbc tmbr tmca tmcc tmcm tmtt traa trab trac tram trat trca trcc trma trmb trra trtc trtr ttab ttbb ttma tttt