a-be aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aacm aacr aaea aaec aaem aama aamb aamc aame aamr aara aarc aare aarm abaa abab abac abae abam abar abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abma abmb abmc abra abrc acaa acab acac acae acar acba acca accc acce accm ace- acea acec acem acer acma acmc acme acr- acra acrc acre acrm acrr aeac aecb aeer aer- aera aerc amaa amac amae amam amar amb- amba ambe ambr amca amcc amec amee amer amm- amma amme amra amrc arab arac arae aram arar arba arbe arc- arca arce arcm area arec aree arem arma armc arme armm arr- arra arrc arre arrr baaa baam baar baba babb babe babm babr bac- baca bacc bace baer bama bamb bamc bame bamm bar- bara barb barc bare barm barr bbbb bbcm bbeb bbrc bcaa bcam bcar bcbc bcca bccc bccm bcec bcer bcma bcra beam bear beba bebb bebe beca beeb beem beer bema beme bera berc bere berm berr bmaa bmce brab brac brae bram brca brcb brce brea breb brec bree brem brer brmc brrm brrr caaa caab caac caam caba cabe cac- caca cacc cace cacm cacr caec caem caer cama camb camc came camm cara carb carc care carm carr cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbea cbec cbee cber cbme cbre cbrm ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm ccee ccma ccmb ccmc ccmm ccra ccrc ccre ceac cear ceba cec- ceca cece cecm ceeb ceec ceem cema cemb ceme cemm cemr cer- cera cerc cere cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmra cmrr crab crac cram crar crbc crca crcc crce crcr cre- crea creb crec cree crem crmb eaba eaca eacc eaec eama eame eara earb eare ebac ebam ebba ebbc ebbr ebcc eber ecaa ecac ecam ecar ecbc ecbe ecca eccb eccc ecce eccm ecem ecma ecra ecrc ecrm ecrr eeca eeea eeee eera eerc emac emae emam emar emba embe embr emcc emer emma emme emra emre eram erba erbb erbe erca ercc erce ereb erec erem erer erma ermc erme erra errc erre maaa maac maam maar maba mabe mac- maca macb macc mace macr maee maem maer mama mamc mame mar- mara marc mare marm marr mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcmc mcrc mear mebe mec- meca mecc mece mecr meem meer mema memc meme memr mer- mera merb merc mere merm mmaa mmab mmac mmar mmcc mmcm mmea mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrce mreb mree mrmc mrrc raab raam raba rabb rabe rac- raca racc race raec raer rama ramb rame ramm rara rarb rare rbbb rbbr rcac rcbc rccb rccc rea- reac reae ream rear reba rebb rebe reca recc rece recm recr reeb reem rema reme rera rere rrmc rrrr