a-ak a-be aaaa aaab aaae aaaf aaar aaba aabb aabt aaea aafa aafb aaff aaka aake aara aare aart aata aatf aatk aatt abaa abab abae abaf abak abar abat abb- abba abbb abbe abbr abbt abee aber abet abff abra abta aeaf aeer aeka aer- aera aeta aetf aetr aett afaa afak afar afat afee afek afer afet affa afft afka afkr afr- afra afre afta afte akaa akae akar akee aker akka akr- akra akre akte arab arae araf arak arar arat arba arbe area aree aref arek aret arfa arfb arff arft arka arke arr- arra arre arrk arrr arrt arta arte artr at-t ataa atab atae atak atar atat atea atee atef ater atfb atfe atka atkt atra atre atrk atta atte attr baaa baaf baak baar baat baba babb babe babr baek baer baff baft bak- baka bake bakr bakt bar- bara barb bare barf bark barr bart bata bate batf batt bbbb bbeb bbet beaf beak bear beat beba bebb bebe beeb beef beek beer beet befa befe beff beft beka beke bera bere berk berr bert beta bete bett bfta bftt brab brae braf brak brat brea breb bree bref brek brer bret brka brkb brrr btaa btaf btek btrt bttb eaaf eaba eafb eara earb eare eart eata eate ebba ebbr eber eeea eeee eefa eefe eeka eeke eera eeta eete efab efbr efet effa efke eft- efta eka- ekab ekeb ekek eker eket ekka ekta eraf erat erba erbb erbe ereb erer eret erft erke erra erre erta etak etat etbr etee eter etfa etfb etfe etka etra etre etta ette f--k faaa faba fabe faeb fafa fafe faff fake fakt fara farb fare fark farr fart fata fate fatf fatt fbar feaf feak fear feat feba feeb feek feer feet fefe feff feke fera ferb fere ferk ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf fkab frab frae frak frat frea free fret frta ftea fter kaaa kaab kaaf kaak kaar kaat kaba kabb kabe kabf kabr kaer kaet kafa kafe kaff kafr kaka kake kakk kakt kara karb kare karf kark karr kart kat- kata katb kate katf katk katr katt kbaa kbab kbae kbak kbar kbat kbba kbbb kbbe kbbf kbbk kbbr kbbt kbeb kbee kbef kbek kber kbet kbfb kbff kbfk kbfr kbft kbkb kbkf kbkk kbkr kbra kbrb kbre kbrf kbrk kbrt kbta kbtb kbte kbtf kbtk kbtr kbtt kea- keak kear keat keba kebb kebe kebr kebt keef keek keer keet kefa kefb keff kefr keft keka kekb keke ker- kera kerb kere kerf kerk kerr kert ket- keta kete ketf ketk ketr kett kfab kfar kfat kfbk kfbt kfeb kfer kffa kffb kfff kffk kfka kfkb kfra kfre kfrr kfta kfte kftk kftt kkaa kkar kkat kkba kkbb kkbe kkbr kkbt kkea kkfr kkft kkkk kkrb kkre kkrf kkrk kkrr kkrt kktk krab krae krak krar krat krba krbb krbe krbk krbr krbt krea kreb kree kref krek kret krfe krff krft krka krke krkk krkr krrb krre krrf krrk krrr krrt krta krtk krtr ktaa ktae ktak ktar ktat ktba ktbb ktbr ktbt ktea ktee ktek ktfb ktkb ktke ktkk ktkr ktkt ktrb ktre ktrf ktrk ktrr ktrt kttf kttk kttr kttt raab raaf raak raat raba rabb rabe rabk raef raer rafa rafe raff raft raka rake rakk rakt rara rarb rare rarf rark rata rate ratf ratk ratt rbaf rbbb rbbr rea- reae reaf reak rear reat reba rebb rebe rebk reeb reef reek reet refe reff refr reft reka reke rekt rera rere rert reta rete retr rett rfae rfef rkkf rrat rrrr rtbf rtee rtfb taa- taaf taar taat taba tabb tabe taer tafa tafe taff taft taka take takk takt tara tarb tare tarf tark tarr tart tata tatb tate tatr tatt tbaf tbar tbrb tbta teak tear teat teba teef teek teer teet teff teft teka teke ter- tera tere terf terk terr teta tete tetr tett tfae tfeb traa trab trae traf trak trat tre- trea tree tref trek tret trfr trra trte trtr ttab ttbb tter ttfa ttff tttt