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 obba obbo obea obec ober obkb oboe obok obor obra obre obro ocab ocac ocak ocbc 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 ooba oobe oocr ooer ooff oooo oora oore orab orac orae orak orao orar orba orbb orbe orbo orca orce orco ore- orea oreb orec orek oreo orer orfe orff orka orke orko oro- oroe orof orok oror orra orro raab raaf raak raba rabb rabe rabk rabo rac- raca racc race rack raco raec raef raer rafa rafc rafe raff raka rake rakk raob raoc raok rara rarb rare rarf rark raro rbaf rbbb rbbr rcac rcaf rcbc rcbo rccb rccc rcfc rea- reac reae reaf reak reao rear reba rebb rebe rebk rebo reca recc rece reck recr reeb reef reek refe reff refr reka reke reko reof rera rere rero rfae rfef rffc rkkf roab roaf roak roar rob- roba robb robe robo roca rocc roce rock roco roea roer rofc rofe roff rofo roka roke rokk roko rokr roob roof rook roor rora rorc rore rork roro rrfc rrrr

-aaa- aaace aaaee aaaoc aaarc aabaa aabba aabra aacbc aacfo aaeaf aaker aakko aakre abaab ababa ababe abaca aback abaco abaer abaka abake abako abara abare abbac abbar abccc abear abeba abebe abece abeer abekr abera abere aberr abfab abkar abkoo aboab abobo aboke abook abora aborc abore abrac abrak abrar abrek acaca acacb acack acake acar- acara acare accra aceae acebo aceof acera acerb acero ackee acker acock acoke acook acore acork acrab acrea acree acro- acrob aeaea aebbe aereo aero- aeroe aface afara afare afcea afcec afear afefe afeka afere affer affor afore afork afree afro- afrob aka-e akaba akabo akaoa akare akbar akce akera akero akker akkra akobo akoka akoko akrak akrar akro- ar-ab ara-c arab- araba arabe arabo araca arace arack araco araea arafo arake arara arare arbab arbar arbee arber arbok arbor arbre arcae arcee arcoa arcor areae arear areca areef areek areka areke areo- arere arero arfe arkar arkoe arkof aroab aroar aroba arobe arock aroer aroof aroor arora arore arrak arrea arroe b-r-k baabe baake babak babar babec babee babek baber babka baboo babra bacab bacao bacar bacca bacco bacea back- backa backe backf baffa bafra bakar bakea baker bakka bakke bakoa bakra bakrc baoro baraa barab barac barak barao barar barba barbe barca barce barco barea barek bareo barer barff bark- barka barke baro- baroa barof barok baroo baror barra barre barro bbbee bbear bbook bcock be-er be-ro beack beaco beafe beara beare bebar bebek beber bebra becak becca becco becke beeac beebe beeke beffe befoe befor bekaa beker bekka bekke bekko bekok bekra beofe beoff berak berar berba berbe berca berck berea berec berek berk- berka berke berko berob beroe berok beror berra berre bface bo-bo boaco boaro bobac bobak