a-ak a-be aaaa aaab aaac aaad aaae aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aack aact aada aadc aade aadt aaea aaec aaka aake aata aatc aatk aatt abaa abab abac abad abae abak abat abb- abba abbb abbe abbt abca abcb abcc abcd abct abda abec abed abee abet abta ac-t acaa acab acac acad acae acat acba acca accc accd acce acct acda acdb acdc acde acdt ace- acea acec aced acek acet ackd acke acta actc acte actt adaa adab adac adad adae adak adat adba adbc adcc adda addc addd adde adea adeb adee adet adta aeac aecb aect aede aedt aeka aeta aetc aett akaa akae akca aked akee akka akte at-t ataa atab atac atad atae atak atat atca atcc atck atdt atea atec ated atee atka atkt atta atte baaa baad baak baat baba babb babe bac- baca bacc bace back bact bada badb badd bade baed baek bak- baka bake bakt bata batc bate batt bbad bbbb bbdd bbeb bbet bcaa bcat bcbc bcca bccc bcda bcde bcec bcet bctc bdbc bddc bead beak beat beba bebb bebe beca beck beda bede beeb beed beek beet beka beke beta betc bete bett btaa btcc btdt btec btek bttb c-cd caaa caab caac caat caba cabe cac- caca cacc cace cack cada cadc cadd cade caec caka cake cat- cata catb catc catd cate catt cbac cbat cbbc cbca cbcc cbce cbct cbdb cbdc cbea cbec cbee cbet cbka cbta cbtc ccaa ccab ccac ccad ccat ccba ccbc ccca cccb cccc ccdc cced ccee cctb cctc cctt cd-e cdaa cdac cdad cdba cdda cddb cdec ceac cead ceat ceba cec- ceca cece cect ceda cedd cede cedt ceeb ceec ceke cet- ceta cete ckac ckat ckbc ckbe ckck cktb ctab ctae ctba ctca ctec ctta daab daad daae daba dabb dabt daca dace dact dada dade daeb daka dake data date datt dbcc dbtt dcbc dcca dccb dccc dcct dcdb dctc dddd deac dead deae deak deba debe debt dec- deca decc decd dece deck dect deda dedd dede deeb deed deek deet dek- deka deke deta dete detk dkba dkdc dtaa dtac dtcc dted dtek eaba eaca eacc eada eadb eadd eaec eata eate ebac ebba ebbc ebcc ebed ecaa ecac ecad ecat ecbc ecbe ecca eccb eccc ecce ecct ecdc eced ecka ect- ecta ectc edac edad edca edda eddc edde ede- edea edta eeca eede eeea eeee eeka eeke eeta eetc eete eka- ekab ekeb eked ekek eket ekka ekta etak etat etbc etcc etec etee etka etta ette kaaa kaab kaak kaat kaba kabb kabc kabd kabe kacb kacc kacd kace kact kad- kada kadd kade kadt kaet kaka kakc kake kakk kakt kat- kata katb katc katd kate katk katt kbaa kbab kbac kbad kbae kbak kbat kbba kbbb kbbc kbbd kbbe kbbk kbbt kbca kbcb kbce kbck kbct kbdb kbde kbeb kbec kbed kbee kbek kbet kbkb kbkk kbta kbtb kbtc kbte kbtk kbtt kcaa kcab kcac kcad kcat kcba kcbc kcbd kcbk kcca kccb kccc kccd kcck kcct kcda kcdc kcdd kcea kceb kcec kced kcee kcet kckc kckk kcta kctb kctc kcte kdaa kdab kdac kdad kdae kdak kdat kdbb kdca kdcc kdcd kdce kddb kddc kddd kddk kdeb kdec kdet kdka kdkb kdkd kdkk kdkt kdta kdtd kea- kead keak keat keba kebb kebc kebe kebt keca keck keda kedb kedc kedd kede kedt keed keek keet keka kekb kekc keke ket- keta ketc ketd kete ketk kett kkaa kkac kkat kkba kkbb kkbd kkbe kkbt kkcb kkcd kkck kkct kkda kkdc kkdd kkdt kkea kked kkkk kktc kktk ktaa ktae ktak ktat ktba ktbb ktbc ktbt ktcc ktce ktck ktdb ktdc ktdd ktde ktdk ktea ktec kted ktee ktek ktkb ktkc ktke ktkk ktkt kttc kttk kttt taa- taat taba tabb tabc tabe taca tacc tace tack tact tada tade taec taka take takk takt tata tatb tate tatt tbca tbcb tbcc tbcd tbce tbta tcad tcca tccc tcdd tctc tdac tddb teac tead teak teat teba teca teck tect teda tedd tede tedk teec teed teek teet teka teke teta tete tett tkac ttab ttbb tttt