a-ak a-be a-ok aaaa aaab aaac aaae aaaf aaar aaba aabb aabc aaca aacb aacc aace aacf aack aaco aacr aaea aaec aafa aafb aafc aaff aaka aake aaoe aaoo aara aarc aare aaro abaa abab abac abae abaf abak abar abb- abba abbb abbe abbo abbr abca abcb abcc abcf abcr abec abee aber abff aboa abob abof abok aboo abor abra abrc abro acaa acab acac acae acar acba acca accc acce accf acco ace- acea acec acek acer acfc acfe acke acoa acoe acor acr- acra acrc acre acro acrr aeac aeaf aecb aeer aeka aer- aera aerc aero afaa afak afao afar afca afcb afcc afee afek afer affa affc affo afka afkr afoa afoe afoo afor afr- afra afrc afre afro akaa akae akao akar akca akee aker akka akko akok akr- akra akre aoba aoca aoce aora aorb arab arac arae araf arak arar arba arbe arc- arca arce arco area arec aree aref arek areo arfa arfb arfc arff arka arke arko aroa arob aroe aroo aror arr- arra arrc arre arrk arro arrr baaa baaf baak baar baba babb babe babo babr bac- baca bacc bace back baco baek baer bafc baff bafo bak- baka bake bako bakr bar- bara barb barc bare barf bark baro barr bbbb bbeb bbfc bbrc bcaa bcar bcbc bcca bccc bcec bcer bcfc bcof bcor bcra beaf beak bear beba bebb bebe bebo beca beck beeb beef beek beer befa befe beff befo beka beke beko beo- beof beok beor bera berc bere berk bero berr bfca boab boac boak boar boba bobb bobe bobo boca boce bock boco boea boec boee boef boeo boer bofa bofe boff boka boke boko boob booc booe boof book boor bor- bora bore borf bork boro borr brab brac brae braf brak brao brca brcb brce brea breb brec bree bref brek breo brer brfc brka brkb broa brob broc broe brok broo bror brrr c-bo caaa caab caac caaf caba cabe cabf cabo cac- caca cacc cace cack caco cacr caec caer cafa cafb cafc cafe caff caka cake caor cara carb carc care carf cark caro carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cbef cber cbfb cbfc cbka cbko cbkr cbre ccaa ccab ccac ccaf ccar ccba ccbc ccca cccb cccc cccf ccee ccfa ccfc ccff ccob ccoc ccra ccrc ccre ccrf ceac cear ceba cec- ceca cece ceco ceeb ceec cef- cefa cefc ceke ceor cer- cera cerc cere cerf cero cfaa cfab cfac cfae cfao cfar cfbc cfbr cfca cfcb cfcf cfco cffb cffr cfoa cfor cfra cfrb cfre ckac ckbc ckbe ckck ckco cker ckfr ckoa ckob ckoc ckoo ckor ckrc coak coba cobb cobe cobo coca coce cock coco cofc cofe coff cok- coka coke coko coob coof cook cor- cora corb corc core corf cork coro corr crab crac craf crar crbc crca crcc crce crcr cre- crea creb crec cree creo crfc crkc crob croc croe crok croo cror eaaf eaba eaca eacc eaec eafb eara earb eare earo ebac ebba ebbc ebbo ebbr ebcc eber ebfc eboe eboo ebor ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco ecef ecfa ecfc ecfr ecka ecko eco- ecra ecrc ecrf ecrr eeca eeea eeee eefa eefe eeka eeke eeoc eera eerc eero efab efbr efca efco efeo effa efke efor eka- ekab ekco ekeb ekek eker ekfc ekka ekoa eoka eora eore eraf erba erbb erbe erca ercc erce ereb erec erer erfc erke erob eroc eroe eroo erra errc erre erro f--k faaa faac faba fabe fabo faca facc face fack faeb fafa fafc fafe faff fafo fake fako fara farb farc fare fark faro farr fbar fcab fcar fcba fcca fccf fcra feaf feak fear feba febo fece feck feeb feek feer fefc fefe feff fefo feke feko feof fera ferb ferc fere ferk fero ferr ffar ffcc ffee ffff ffrr fkab foaf foak foar foba foca foce fock foco foer fofo foke foof fook for- fora forb fore fork foro forr frab frac frae frak frbc frcc frea free freo frfc frob froe kaaa kaab kaaf kaak kaar kaba kabb kabc kabe kabf kabo kabr kacb kacc kace kaco kaeo kaer kafa kafc kafe kaff kafr kaka kakc kake kakk kako kaoa kaoc kaok kaor kara karb kare karf kark karo karr kbaa kbab kbac kbae kbak kbar kbba kbbb kbbc kbbe kbbf kbbk kbbo kbbr kbca kbcb kbce kbck kbco kbcr kbeb kbec kbee kbef kbek kbeo kber kbfb kbfc kbff kbfk kbfo kbfr kbkb kbkf kbkk kbko kbkr kboa kbob kboc kboe kbok kboo kbra kbrb kbrc kbre kbrf kbrk kbro kcaa kcab kcac kcar kcba kcbc kcbf kcbk kcbr kcca kccb kccc kcck kccr kcea kceb kcec kcee kceo kcfa kcfb kcfc kcfo kckc kckf kckk kcko kckr kcob kcoe kcof kcor kcrc kcro kcrr kea- keak kear keba kebb kebc kebe kebr keca keck keco kecr keef keek keer kefa kefb kefc keff kefr keka kekb kekc keke keko keok ker- kera kerb kerc kere kerf kerk kero kerr kfab kfac kfar kfbc kfbk kfcf kfco kfcr kfeb kfer kffa kffb kfff kffk kfka kfkb kfok kfoo kfor kfra kfrc kfre kfro kfrr kkaa kkac kkar kkba kkbb kkbe kkbo kkbr kkcb kkck kkco kkcr kkea kkfr kkkk kkoa kkob kkoo kkor kkrb kkrc kkre kkrf kkrk kkro kkrr koab koac koae koak koar koba kobb kobc kobe kobk kobo kobr koca kocb kocf kock koea kofa kofc kofe koff kofk kofo koka kokb kokc koke kokf kokk koko kokr koob kooc kook kooo koor kora korb korc kore korf kork koro korr krab krac krae krak krar krba krbb krbe krbk krbr krca krcb krcc krce krco krea kreb krec kree kref krek kreo krfc krfe krff krfo krka krkc krke krkk krko krkr kroa krob kroc kroe krof krok kroo kror krrb krrc krre krrf krrk krro krrr o-eo oaer oafc oafo oake oara oare obak