a-ak a-be aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aabt aada aade aadt aaea aafa aafb aafd aaff aaka aake aara aard aare aart aata aatf aatk aatt abaa abab abad abae abaf abak abar abat abb- abba abbb abbe abbr abbt abda abed abee aber abet abff abra abta adaa adab adad adae adak adar adat adba adda addd adde addr adea adeb adee ader adet adfa adra adre adta aeaf aede aedt aeer aeka aer- aera aerd aeta aetf aetr aett afaa afad afak afar afat afdb afee afek afer afet affa afft afka afkr afr- afra afre afta afte akaa akae akar aked akee aker akka akr- akra akre akte arab arad arae araf arak arar arat arba arbe arda arde ardf area ared aree aref arek aret arfa arfb arff arft arka arke arr- arra arre arrk arrr arrt arta arte artr at-t ataa atab atad atae atak atar atat atdt atea ated atee atef ater atfb atfe atka atkt atra atre atrk atta atte attr baaa baad baaf baak baar baat baba babb babe babr bada badb badd bade badr baed baek baer baff baft bak- baka bake bakr bakt bar- bara barb bard bare barf bark barr bart bata bate batf batt bbad bbbb bbdd bbeb bbet bd-r bead beaf beak bear beat beba bebb bebe beda bede beeb beed beef beek beer beet befa befe beff beft beka beke bera berd bere berk berr bert beta bete bett bfta bftt brab brad brae braf brak brat brda brdt brea breb bred bree bref brek brer bret brka brkb brrr btaa btaf btdt btek btrt bttb daab daad daae daar daba dabb dabt dada dade daeb daer dafa dafe daff daft daka dake dara darb dard dare darf dark darr dart data date datr datt dbar dbtt dddd ddre dead deae deaf deak dear deba debe debt deda dedd dede deeb deed deef deek deer deet defe deff deft dek- deka deke der- dera derb dere derf derk derr deta dete detk detr dfaf dfdt dfer dffa dfrf dftr dkba draa drab drad draf drak drar drat drba drda drea dred dree dref drek dret drra dtaa dted dtek eaaf eaba eada eadb eadd eafb eara earb eard eare eart eata eate ebba ebbr ebed eber edad edar edda edde ede- edea eder edfa edra edta eede eeea eeee eefa eefe eeka eeke eera eeta eete efab efbr efda efet effa efke eft- efta eka- ekab ekeb eked ekek eker eket ekka ekta erad eraf erat erba erbb erbe erda erde erdf ereb ered erer eret erft erke erra erre erta etak etat etbr etee eter etfa etfb etfe etka etra etre etta ette f--k faaa faad faba fabd fabe fada fadd fade faeb fafa fafe faff fake fakt fara farb fard fare fark farr fart fata fate fatf fatt fbar fead feaf feak fear feat feba feda fede feeb feed feek feer feet fefe feff feke fera ferb ferd fere ferk ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf fkab frab frad frae frak frat frea fred free fret frta ftea fter kaaa kaab kaaf kaak kaar kaat kaba kabb kabd kabe kabf kabr kad- kada kadd kade kadf kadr kadt kaer kaet kafa kafe kaff kafr kaka kake kakk kakt kara karb kard kare karf kark karr kart kat- kata katb katd kate katf katk katr katt kbaa kbab kbad kbae kbak kbar kbat kbba kbbb kbbd kbbe kbbf kbbk kbbr kbbt kbdb kbde kbdf kbdr kbeb kbed kbee kbef kbek kber kbet kbfb kbff kbfk kbfr kbft kbkb kbkf kbkk kbkr kbra kbrb kbrd kbre kbrf kbrk kbrt kbta kbtb kbte kbtf kbtk kbtr kbtt kdaa kdab kdad kdae kdaf kdak kdar kdat kdbb kdbr kddb kddd kddf kddk kddr kdeb kdef kdet kdfr kdft kdka kdkb kdkd kdkk kdkr kdkt kdrb kdrf kdta kdtd kdtr kea- kead keak kear keat keba kebb kebe kebr kebt keda kedb kedd kede kedr kedt keed keef keek keer keet kefa kefb keff kefr keft keka kekb keke ker- kera kerb kere kerf kerk kerr kert ket- keta ketd kete ketf ketk ketr kett kfab kfar kfat kfbk kfbt kfda kfeb kfed kfer kffa kffb kfff kffk kfka kfkb kfra kfrd kfre kfrr kfta kfte kftk kftt kkaa kkar kkat kkba kkbb kkbd kkbe kkbr kkbt kkda kkdd kkdt kkea kked kkfr kkft kkkk kkrb kkre kkrf kkrk kkrr kkrt kktk krab krad krae krak krar krat krba krbb krbd krbe krbk krbr krbt krda krdd krde krdr krea kreb kred kree kref krek kret krfd krfe krff krft krka krkd krke krkk krkr krrb krre krrf krrk krrr krrt krta krtk krtr ktaa ktae ktak ktar ktat ktba ktbb ktbr ktbt ktdb ktdd ktde ktdf ktdk ktdr ktea kted ktee ktek ktfb ktkb ktke ktkk ktkr ktkt ktrb ktre ktrf ktrk ktrr ktrt kttf kttk kttr kttt raab raad raaf raak raat raba rabb rabe rabk rada radd rade radr radt raed raef raer rafa rafe raff raft raka rake rakk rakt rara rarb rare rarf rark rata rate ratf ratk ratt rbaf rbbb rbbr rder rdfa rea- read reae reaf reak rear reat reba rebb rebe rebk reda redd rede redr reeb reed reef reek reet refd refe reff refr reft reka reke rekt rera rerd rere rert reta retd rete retr rett rfae rfef rkkf rrad rrat rred rrrr rtbf rtdt rtee rtfb taa- taaf taar taat taba tabb tabe tada tade taer tafa tafe taff taft taka take takk takt tara tarb tard tare tarf tark tarr tart tata tatb tate tatr tatt tbaf tbar tbrb tbta tddb tdff tdkr tdra tead teak tear teat teba teda tedd tede tedk teed teef teek teer teet teff teft teka teke ter- tera tere terf terk terr teta tete tetr tett tfae tfeb traa trab trad trae traf trak trat tre- trea tred tree tref trek tret trfd trfr trra trte trtr ttab ttbb tter ttfa ttff