a-ak a-be aaaa aaab aaac aaae aaar aaba aabb aabc aabt aaca aacb aacc aace aack aacr aact aaea aaec aaka aake aara aarc aare aart aata aatc aatk aatt abaa abab abac abae abak abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcr abct abec abee aber abet abra abrc abta ac-t acaa acab acac acae acar acat acba acca accc acce acct ace- acea acec acek acer acet acke acr- acra acrc acre acrr acta actc acte actt aeac aecb aect aeer aeka aer- aera aerc aeta aetc aetr aett akaa akae akar akca akee aker akka akr- akra akre akte arab arac arae arak arar arat arba arbe arc- arca arce arct area arec aree arek aret arka arke arr- arra arrc arre arrk arrr arrt arta artc arte artr at-t ataa atab atac atae atak atar atat atca atcc atck atcr atea atec atee ater atka atkt atra atrc atre atrk atta atte attr baaa baak baar baat baba babb babe babr bac- baca bacc bace back bact baek baer bak- baka bake bakr bakt bar- bara barb barc bare bark barr bart bata batc bate batt bbbb bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcra bctc beak bear beat beba bebb bebe beca beck beeb beek beer beet beka beke bera berc bere berk berr bert beta betc bete bett brab brac brae brak brat brca brcb brce brea breb brec bree brek brer bret brka brkb brrr brtc btaa btcc btec btek btrc btrt bttb caaa caab caac caat caba cabe cac- caca cacc cace cack cacr caec caer caka cake cara carb carc care cark carr cart cat- cata catb catc cate catt cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbea cbec cbee cber cbet cbka cbkr cbre cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc ccee ccra ccrc ccre ccrt cctb cctc cctt ceac cear ceat ceba cec- ceca cece cect ceeb ceec ceke cer- cera cerc cere cert cet- ceta cete ckac ckat ckbc ckbe ckck cker ckrc cktb crab crac crar crat crbc crca crcc crce crcr cre- crea creb crec cree cret crkc crrt crtc ctab ctae ctba ctca ctec ctrc ctta eaba eaca eacc eaec eara earb eare eart eata eate ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecat ecbc ecbe ecca eccb eccc ecce ecct ecka ecra ecrc ecrr ect- ecta ectc eeca eeea eeee eeka eeke eera eerc eeta eetc eete eka- ekab ekeb ekek eker eket ekka ekta erat erba erbb erbe erca ercc erce ereb erec erer eret erke erra errc erre erta etak etat etbc etbr etcc etec etee eter etka etra etre etta ette kaaa kaab kaak kaar kaat kaba kabb kabc kabe kabr kacb kacc kace kact kaer kaet kaka kakc kake kakk kakt kara karb kare kark karr kart kat- kata katb katc kate katk katr katt kbaa kbab kbac kbae kbak kbar kbat kbba kbbb kbbc kbbe kbbk kbbr kbbt kbca kbcb kbce kbck kbcr kbct kbeb kbec kbee kbek kber kbet kbkb kbkk kbkr kbra kbrb kbrc kbre kbrk kbrt kbta kbtb kbtc kbte kbtk kbtr kbtt kcaa kcab kcac kcar kcat kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kcct kcea kceb kcec kcee kcet kckc kckk kckr kcrc kcrr kcrt kcta kctb kctc kcte kea- keak kear keat keba kebb kebc kebe kebr kebt keca keck kecr keek keer keet keka kekb kekc keke ker- kera kerb kerc kere kerk kerr kert ket- keta ketc kete ketk ketr kett kkaa kkac kkar kkat kkba kkbb kkbe kkbr kkbt kkcb kkck kkcr kkct kkea kkkk kkrb kkrc kkre kkrk kkrr kkrt kktc kktk krab krac krae krak krar krat krba krbb krbe krbk krbr krbt krca krcb krcc krce krea kreb krec kree krek kret krka krkc krke krkk krkr krrb krrc krre krrk krrr krrt krta krtc krtk krtr ktaa ktae ktak ktar ktat ktba ktbb ktbc ktbr ktbt ktcc ktce ktck ktcr ktea ktec ktee ktek ktkb ktkc ktke ktkk ktkr ktkt ktrb ktrc ktre ktrk ktrr ktrt kttc kttk kttr kttt raab raak raat raba rabb rabe rabk rac- raca racc race rack ract raec raer raka rake rakk rakt rara rarb rare rark rata rate ratk ratt rbbb rbbr rcac rcbc rccb rccc rcet rctc rea- reac reae reak rear reat reba rebb rebe rebk reca recc rece reck recr rect reeb reek reet reka reke rekt rera rere rert reta rete retr rett rrat rrrr rtca rtcc rtce rtee taa- taar taat taba tabb tabc tabe taca tacc tace tack tact taec taer taka take takk takt tara tarb tarc tare tark tarr tart tata tatb tate tatr tatt tbar tbca tbcb tbcc tbce tbrb tbta tcca tccc tctc teac teak tear teat teba teca teck tecr tect teec teek teer teet teka teke ter- tera terc tere terk terr teta tete tetr tett tkac traa trab trac trae trak trat trca trcc tre- trea trec tree trek tret trra trtc trte trtr ttab ttbb tter tttt