a-ak a-be a-ok aaaa aaab aaac aaae aaaf aaba aabb aabc aabt aaca aacb aacc aace aacf aack aaco aact aaea aaec aafa aafb aafc aaff aaka aake aaoe aaoo aata aatc aatf aatk aatt abaa abab abac abae abaf abak abat abb- abba abbb abbe abbo abbt abca abcb abcc abcf abct abec abee abet abff aboa abob abof abok aboo abot abta ac-t acaa acab acac acae acat acba acca accc acce accf acco acct ace- acea acec acek acet acfc acfe acft acke acoa acoe acot acta actc acte actf acto actt aeac aeaf aecb aect aeka aeta aetc aetf aeto aett afaa afak afao afat afca afcb afcc afee afek afet affa affc affo afft afka afoa afoe afoo afta aftc afte akaa akae akao akca akee akka akko akok akot akte aoba aoca aoce aotc aotf at-t ataa atab atac atae atak atat atca atcc atcf atck atco atea atec atee atef ateo atfb atfc atfe atka atkt atob atoc atoe atof atok atot atta atte atto baaa baaf baak baat baba babb babe babo bac- baca bacc bace back baco bact baek bafc baff bafo baft bak- baka bake bako bakt bata batc bate batf bato batt bbbb bbeb bbet bbfc bcaa bcat bcbc bcca bccc bcec bcet bcfc bcof bctc beaf beak beat beba bebb bebe bebo beca beck beeb beef beek beet befa befe beff befo beft beka beke beko beo- beof beok beot beta betc bete beto bett bfca bfta bftt boab boac boak boat boba bobb bobe bobo boca boce bock boco boea boec boee boef boeo boet bofa bofe boff boka boke boko boob booc booe boof book boot bota botb bote boto bott btaa btaf btcc btec btek btfc btob bttb c-bo caaa caab caac caaf caat caba cabe cabf cabo cac- caca cacc cace cack caco caec cafa cafb cafc cafe caff caka cake cat- cata catb catc cate catf cato catt cbac cbat cbbc cbca cbcc cbce cbct cbea cbec cbee cbef cbet cbfb cbfc cbka cbko cbot cbta cbtc cbtf ccaa ccab ccac ccaf ccat ccba ccbc ccca cccb cccc cccf ccee ccfa ccfc ccff ccob ccoc cctb cctc cctt ceac ceat ceba cec- ceca cece ceco cect ceeb ceec cef- cefa cefc ceke cet- ceta cete ceto cfaa cfab cfac cfae cfao cfbc cfbt cfca cfcb cfcf cfco cffb cfoa cfta cftc cfte cftk ckac ckat ckbc ckbe ckck ckco ckoa ckob ckoc ckoo ckot cktb coak coat coba cobb cobe cobo coca coce cock coco coct cofc cofe coff coft cok- coka coke coko coob coof cook coot cota cotb cotc cote coto cott ctab ctae ctba ctca ctcf ctec ctfc ctfo ctot ctta eaaf eaba eaca eacc eaec eafb eata eate ebac ebba ebbc ebbo ebcc ebfc eboe eboo ecaa ecac ecao ecat ecbc ecbe ecca eccb eccc ecce ecco ecct ecef ecfa ecfc ecka ecko eco- ecot ect- ecta ectc ectf ecto eeca eeea eeee eefa eefe eeka eeke eeoc eeta eetc eete efab efca efco efeo efet effa efke eft- efta eka- ekab ekco ekeb ekek eket ekfc ekka ekoa ekta eoka eota eotc eoto etak etat etbc etcc etco etec etee etfa etfb etfc etfe etka etoe etok etta ette etto f--k faaa faac faba fabe fabo faca facc face fack fact faeb fafa fafc fafe faff fafo fake fako fakt fata fatc fate fatf fato fatt fcab fcat fcba fcca fccf fcot fcto feaf feak feat feba febo fece feck fect feeb feek feet fefc fefe feff fefo feke feko feof feta fete fett ffcc ffee ffff fftf fkab foaf foak foba fobt foca foce fock foco fofo foke foof fook foot fota fote foto fott ft-c ftea ftfc kaaa kaab kaaf kaak kaat kaba kabb kabc kabe kabf kabo kacb kacc kace kaco kact kaeo kaet kafa kafc kafe kaff kaka kakc kake kakk kako kakt kaoa kaoc kaok kat- kata katb katc kate katf katk kato katt kbaa kbab kbac kbae kbak kbat kbba kbbb kbbc kbbe kbbf kbbk kbbo kbbt kbca kbcb kbce kbck kbco kbct kbeb kbec kbee kbef kbek kbeo kbet kbfb kbfc kbff kbfk kbfo kbft kbkb kbkf kbkk kbko kboa kbob kboc kboe kbok kboo kbot kbta kbtb kbtc kbte kbtf kbtk kbto kbtt kcaa kcab kcac kcat kcba kcbc kcbf kcbk kcca kccb kccc kcck kcct kcea kceb kcec kcee kceo kcet kcfa kcfb kcfc kcfo kcft kckc kckf kckk kcko kcob kcoe kcof kcot kcta kctb kctc kcte kcto kea- keak keat keba kebb kebc kebe kebt keca keck keco keef keek keet kefa kefb kefc keff keft keka kekb kekc keke keko keok ket- keta ketc kete ketf ketk keto kett kfab kfac kfat kfbc kfbk kfbt kfcf kfco kfeb kffa kffb kfff kffk kfka kfkb kfok kfoo kfta kftc kfte kftk kftt kkaa kkac kkat kkba kkbb kkbe kkbo kkbt kkcb kkck kkco kkct kkea kkft kkkk kkoa kkob kkoo kkot kktc kktk koab koac koae koak koba kobb kobc kobe kobk kobo koca kocb kocf kock koct koea kofa kofc kofe koff kofk kofo koft koka kokb kokc koke kokf kokk koko koob kooc kook kooo koot kota kotb kotc kote kotk koto kott ktaa ktae ktak ktao ktat ktba ktbb ktbc ktbt ktcc ktce ktck ktco ktea ktec ktee ktek ktfb ktfc ktfo ktkb ktkc ktke ktkk ktko ktkt ktob ktoc ktoe ktok ktoo ktot kttc kttf kttk ktto kttt o-eo oafc oafo oake oate obak obba obbo obea obec obet obkb oboe obok obot ocab ocac ocak ocat ocbc occa occc occt oce ocee ocef ocet ocfa ocke oct- octa octe octo oec- oeca oecc oeec oeta ofek off- offa offc offe offo ofta okak oket okka okko okok okot okta okto ooaa ooak ooba oobe ooff oooo ootb otac otak otea otee otfc oto- otoe otof otok otoo otta otte otto taa- taaf taat taba tabb tabc tabe tabo taca tacc tace tack taco tact taec tafa tafc tafe taff tafo taft taka