a-be aaaa aaab aaae aaam aaar aaba aabb aabm aabt aaea aaem aama aamb aame aamr aara aare aarm aart aata aatt abaa abab abae abam abar abat abb- abba abbb abbe abbr abbt abee aber abet abma abmb abmt abra abta aeer aemt aer- aera aeta aetr aett amaa amae amam amar amat amb- amba ambe ambr amee amer amet amm- amma amme amra amta amte arab arae aram arar arat arba arbe area aree arem aret arma arme armm armt arr- arra arre arrr arrt arta arte artr at-t ataa atab atae atar atat atea atee atem ater atm- atma atme atra atre atrm atta atte attr baaa baam baar baat baba babb babe babm babr baer bama bamb bame bamm bar- bara barb bare barm barr bart bata bate batt bbbb bbeb bbet beam bear beat beba bebb bebe beeb beem beer beet bema beme bera bere berm berr bert beta bete bett bmaa brab brae bram brat brea breb bree brem brer bret brrm brrr btaa btrt bttb eaba eama eame eara earb eare eart eata eate ebam ebba ebbr eber eeea eeee eera eeta eete emae emam emar emba embe embr emer emet emma emme emra emre emta emte eram erat erba erbb erbe ereb erem erer eret erma erme erra erre erta etam etat etbr etee etem eter etra etre etrm etta ette maaa maam maar maat maba mabe maee maem maer mama mame mar- mara mare marm marr mart mata mate matr matt mbam mbba mbta mear meat mebe meem meer meet mema meme memr mer- mera merb mere merm mert met- meta mete mett mmaa mmab mmar mmea mmmm mrbb mrbm mreb mree mrta mrtm mrtt mtaa mtab mtre mtrr mttr raab raam raat raba rabb rabe raer rama ramb rame ramm rara rarb rare rata rate ratt rbbb rbbr rea- reae ream rear reat reba rebb rebe reeb reem reet rema reme rera rere rert reta rete retr rett rrat rrrr rtee taa- taar taat taba tabb tabe taem taer tama tame tamm tara tarb tare tarm tarr tart tata tatb tate tatr tatt tbar tbrb tbta team tear teat teba teem teer teet tema teme ter- tera tere term terr teta tete tetr tett tmaa tmbr tmtt traa trab trae tram trat tre- trea tree trem tret trma trmb trra trte trtr ttab ttbb tter ttma tttt