a-ak a-be aaaa aaab aaac aaae aaaf aaal aaar aaba aabb aabc aabl aaca aacb aacc aace aacf aack aacl aacr aaea aaec aafa aafb aafc aaff aafl aaka aake aala aalc aale aall aara aarc aare abaa abab abac abae abaf abak abal abar abb- abba abbb abbe abbr abca abcb abcc abcf abcl abcr abec abee abel aber abff abla able abra abrc acaa acab acac acae acar acba acbl acca accc acce accf ace- acea acec acek acel acer acfc acfe acfl acke acla aclc acle aclr acr- acra acrc acre acrr aeac aeaf aecb aecl aeer aeka aela aelc aer- aera aerc afaa afak afar afca afcb afcc afee afek afel afer affa affc afka afkr afla aflc afle afr- afra afrc afre akaa akae akal akar akca akee akel aker akka akle akr- akra akre alaa alac alae alak alal alar alb- alba albc albe alca alcc alce alea alec alee alef alek aler alfa alfe alk- alka alkb alke all- alla alle alll allr arab arac arae araf arak aral arar arba arbe arc- arca arce area arec aree aref arek arel arfa arfb arfc arff arka arke arla arle arr- arra arrc arre arrk arrr baaa baaf baak baal baar baba babb babe babr bac- baca bacc bace back baek bael baer bafc baff bak- baka bake bakl bakr bala balc bale balf balk ball bar- bara barb barc bare barf bark barr bbbb bbeb bbfc bblb bbrc bcaa bcar bcbc bcca bccc bccl bcec bcer bcfc bcra beaf beak beal bear beba bebb bebe beca beck beeb beef beek beel beer befa befe beff beka beke bela bele belk bell bera berc bere berk berr bfca bffl blaa blab blac blae blak blea bleb blee blek blfc blkb blrc brab brac brae braf brak brca brcb brce brea breb brec bree bref brek brel brer brfc brka brkb brrr caaa caab caac caaf caal caba cabe cabf cac- caca cacc cace cack cacr caec caer cafa cafb cafc cafe caff cafl caka cake cala calc cale calf calk call cara carb carc care carf cark carl carr cbac cbal cbar cbbc cbca cbcc cbce cbcl cbcr cbea cbec cbee cbef cber cbfb cbfc cbka cbkl cbkr cblb cblc cbre cbrl ccaa ccab ccac ccaf ccar ccba ccbc ccca cccb cccc cccf cccl ccee ccel ccfa ccfc ccff ccfl ccla cclc ccra ccrc ccre ccrf ccrl ceac ceal cear ceba cec- ceca cece ceeb ceec ceel cef- cefa cefc ceke cel- cela celc cele celf cell cer- cera cerc cere cerf cerl cfaa cfab cfac cfae cfar cfbc cfbr cfca cfcb cfcf cfcl cffb cffr cfra cfrb cfre ckac ckbc ckbe ckck ckcl cker ckfr cklf ckrc clab claf clar clea clec clee clef clek cler clra crab crac craf crar crbc crca crcc crce crcr cre- crea creb crec cree crfc crfl crkc crkl crlf e-cl e-la eaaf eaba eaca eacc eaec eafb eala ealc eale eara earb eare earl ebac ebal ebba ebbc ebbr ebcc ebel eber ebfc ebla ecaa ecac ecal ecar ecbc ecbe ecca eccb eccc ecce eccl ecef ecfa ecfc ecfr ecka ecla ecra ecrc ecrf ecrl ecrr eeca eeea eeee eefa eefe eefl eeka eeke eele eera eerc efab efbr efca effa efke efla eka- ekab ekeb ekek eker ekfc ekka el-b elab elac elal elar elba elbe elca elcb elce elea elec elee elef elek eler elfa elfc elfe elka elke ella elle elra eraf eral erba erbb erbe erca ercc erce ereb erec erel erer erfc erke erla erle erll erra errc erre f--k faaa faac faba fabe faca facc face fack faeb fafa fafc fafe faff fake fala falc fale falk fall fara farb farc fare fark farl farr fbar fbla fble fcab fcal fcar fcba fcca fccf fcra feaf feak feal fear feba fece feck feeb feek feel feer fefc fefe feff feke fela fele felf felk fell fera ferb ferc fere ferk ferr ffar ffcc ffee ffff ffrr fkab flab flac flae flak flcl flea flee fler frab frac frae frak frbc frcc frea free frfc frla kaaa kaab kaaf kaak kaal kaar kaba kabb kabc kabe kabf kabr kacb kacc kace kacl kael kaer kafa kafc kafe kaff kafr kaka kakc kake kakk kala kalb kalc kale kalf kalk kall kara karb kare karf kark karl karr kbaa kbab kbac kbae kbak kbal kbar kbba kbbb kbbc kbbe kbbf kbbk kbbl kbbr kbca kbcb kbce kbck kbcl kbcr kbeb kbec kbee kbef kbek kbel kber kbfb kbfc kbff kbfk kbfl kbfr kbkb kbkf kbkk kbkl kbkr kbla kblb kble kblf kbll kblr kbra kbrb kbrc kbre kbrf kbrk kbrl kcaa kcab kcac kcal kcar kcba kcbc kcbf kcbk kcbl kcbr kcca kccb kccc kcck kccl kccr kcea kceb kcec kcee kcel kcfa kcfb kcfc kcfl kckc kckf kckk kckl kckr kcla kclc kcle kclf kclk kcll kclr kcrc kcrr kea- keak keal kear keba kebb kebc kebe kebr keca keck kecr keef keek keel keer kefa kefb kefc keff kefr keka kekb kekc keke kekl kela kele kelf kelk kell ker- kera kerb kerc kere kerf kerk kerl kerr kfab kfac kfal kfar kfbc kfbk kfcf kfcr kfeb kfel kfer kffa kffb kfff kffk kfka kfkb kfla kflb kflc kflf kfll kfra kfrc kfre kfrr kkaa kkac kkal kkar kkba kkbb kkbe kkbl kkbr kkcb kkck kkcl kkcr kkea kkfr kkkk kklb kklc kklf kkll kkrb kkrc kkre kkrf kkrk kkrl kkrr klaa klab klac klaf klak klal klar klbb klbc klbe klbf klbl klca klcb klcc klce klck klcl klcr klea kleb klec klee klef klek kler klfa klfc klfe klff klka klkc klkk klkl klkr klla kllb kllc klle kllk klrc klrf klrk klrr krab krac krae krak kral krar krba krbb krbe krbk krbl krbr krca krcb krcc krce krcl krea kreb krec kree kref krek krfc krfe krff krka krkc krke krkk krkr krla krlc krle krlf krrb krrc krre krrf krrk krrl krrr laaa laac laak