a-ak a-ok aaaa aaac aaae aaaf aaar aaca aacc aace aacf aack aaco aacr aaea aaec aafa aafc aaff aaka aake aaoe aaoo aara aarc aare aaro acaa acac acae acar acca accc acce accf acco ace- acea acec acek acer acfc acfe acke acoa acoe acor acr- acra acrc acre acro acrr aeac aeaf aeer aeka aer- aera aerc aero afaa afak afao afar afca 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 aoca aoce aora arac arae araf arak arar arc- arca arce arco area arec aree aref arek areo arfa arfc arff arka arke arko aroa aroe aroo aror arr- arra arrc arre arrk arro arrr caaa caac caaf cac- caca cacc cace cack caco cacr caec caer cafa cafc cafe caff caka cake caor cara carc care carf cark caro carr ccaa ccac ccaf ccar ccca cccc cccf ccee ccfa ccfc ccff ccoc ccra ccrc ccre ccrf ceac cear cec- ceca cece ceco ceec cef- cefa cefc ceke ceor cer- cera cerc cere cerf cero cfaa cfac cfae cfao cfar cfca cfcf cfco cffr cfoa cfor cfra cfre ckac ckck ckco cker ckfr ckoa ckoc ckoo ckor ckrc coak coca coce cock coco cofc cofe coff cok- coka coke coko coof cook cor- cora corc core corf cork coro corr crac craf crar crca crcc crce crcr cre- crea crec cree creo crfc crkc croc croe crok croo cror eaaf eaca eacc eaec eara eare earo ecaa ecac ecao ecar ecca 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 efca efco efeo effa efke efor eka- ekco ekek eker ekfc ekka ekoa eoka eora eore eraf erca ercc erce erec erer erfc erke eroc eroe eroo erra errc erre erro f--k faaa faac faca facc face fack fafa fafc fafe faff fafo fake fako fara farc fare fark faro farr fcar fcca fccf fcra feaf feak fear fece feck feek feer fefc fefe feff fefo feke feko feof fera ferc fere ferk fero ferr ffar ffcc ffee ffff ffrr foaf foak foar foca foce fock foco foer fofo foke foof fook for- fora fore fork foro forr frac frae frak frcc frea free freo frfc froe kaaa kaaf kaak kaar kacc kace kaco kaeo kaer kafa kafc kafe kaff kafr kaka kakc kake kakk kako kaoa kaoc kaok kaor kara kare karf kark karo karr kcaa kcac kcar kcca kccc kcck kccr kcea kcec kcee kceo kcfa kcfc kcfo kckc kckf kckk kcko kckr kcoe kcof kcor kcrc kcro kcrr kea- keak kear keca keck keco kecr keef keek keer kefa kefc keff kefr keka kekc keke keko keok ker- kera kerc kere kerf kerk kero kerr kfac kfar kfcf kfco kfcr kfer kffa kfff kffk kfka kfok kfoo kfor kfra kfrc kfre kfro kfrr kkaa kkac kkar kkck kkco kkcr kkea kkfr kkkk kkoa kkoo kkor kkrc kkre kkrf kkrk kkro kkrr koac koae koak koar koca kocf kock koea kofa kofc kofe koff kofk kofo koka kokc koke kokf kokk koko kokr kooc kook kooo koor kora korc kore korf kork koro korr krac krae krak krar krca krcc krce krco krea krec kree kref krek kreo krfc krfe krff krfo krka krkc krke krkk krko krkr kroa kroc kroe krof krok kroo kror krrc krre krrf krrk krro krrr o-eo oaer oafc oafo oake oara oare ocac ocak occa occc oce ocee ocef ocfa ocke ocra ocre ocro ocrr oec- oeca oecc oeec oera oere ofcr ofek ofer off- offa offc offe offo offr ofor ofra ofre okak oker okka okko okok okor okra okre okro ooaa ooak oocr ooer ooff oooo oora oore orac orae orak orao orar orca orce orco ore- orea orec orek oreo orer orfe orff orka orke orko oro- oroe orof orok oror orra orro raaf raak rac- raca racc race rack raco raec raef raer rafa rafc rafe raff raka rake rakk raoc raok rara rare rarf rark raro rcac rcaf rccc rcfc rea- reac reae reaf reak reao rear reca recc rece reck recr reef reek refe reff refr reka reke reko reof rera rere rero rfae rfef rffc rkkf roaf roak roar roca rocc roce rock roco roea roer rofc rofe roff rofo roka roke rokk roko rokr roof rook roor rora rorc rore rork roro rrfc rrrr