a-ak a-be a-ok aaaa aaab aaae aaaf aaap aaar aaba aabb aabp aaea aaep aafa aafb aaff aaka aake aaoe aaoo aapa aapo aara aare aaro aarp abaa abab abae abaf abak abap abar abb- abba abbb abbe abbo abbr abee aber abff aboa abob abof abok aboo abor abpa abpp abpr abra abro aeaf aeap aeer aeka aer- aera aero afaa afak afao afap afar afee afek afer affa affo afka afkr afoa afoe afoo afor afpa afpe afr- afra afre afro akaa akae akao akap akar akee aker akka akko akok akpo akr- akra akre aoba aokp aopo aora aorb apak apao apap apar apba apbr apea apep aper apfa apfo apke apo- apoe apof apoo apop apor appa appr apra apre apro arab arae araf arak arap arar arba arbe area aree aref arek areo arep arfa arfb arff arka arke arko aroa arob aroe aroo aror arpa arpe arr- arra arre arrk arro arrr baaa baaf baak baar baba babb babe babo babr baek baer baff bafo bak- baka bake bako bakr bapa bape bapp bar- bara barb bare barf bark baro barr bbbb bbeb bbpr beaf beak beap bear beba bebb bebe bebo beeb beef beek beep beer befa befe beff befo beka beke beko beo- beof beok beor bepo bera bere berk bero berr bfpo bfpp bkpr boab boak boar boba bobb bobe bobo boea boee boef boeo boep boer bofa bofe boff boka boke boko boob booe boof book boop boor bopa bope bopp bor- bora bore borf bork boro borr bpea bpoe brab brae braf brak brao brea breb bree bref brek breo brep brer brka brkb broa brob broe brok broo bror brrr eaaf eaba eafb eaop eapp eara earb eare earo earp ebba ebbo ebbr eber eboe eboo ebor ebpo ebro eeea eeee eefa eefe eeka eeke eera eero efab efbr efeo effa efke efor efpa eka- ekab ekeb ekek eker ekka ekoa ekpe ekpo eoka eora eore epaa epee eper epfa epor eppa eppo eppp epra eprb epro eprp eraf erap erba erbb erbe ereb erer erke erob eroe eroo erpa erpe erra erre erro f--k faaa faap faba fabe fabo faeb fafa fafe faff fafo fake fako fapa fape fapp fara farb fare fark faro farp farr fbar fbop feaf feak feap fear feba febo feeb feek feer fefe feff fefo feke feko feof fepa fera ferb fere ferk fero ferr ffar ffee ffff ffrr fkab fkbp foaf foak foar foba foer fofo foke foof fook fopp for- fora forb fore fork foro forr fpaa fpra fprf frab frae frak frap frea free freo frep frob froe frop kaaa kaab kaaf kaak kaap kaar kaba kabb kabe kabf kabo kabr kaeo kaep kaer kafa kafe kaff kafp kafr kaka kake kakk kako kaoa kaok kaor kap- kapa kape kapf kapo kapp kara karb kare karf kark karo karp karr kbaa kbab kbae kbak kbap kbar kbba kbbb kbbe kbbf kbbk kbbo kbbr kbeb kbee kbef kbek kbeo kber kbfb kbff kbfk kbfo kbfp kbfr kbkb kbkf kbkk kbko kbkr kboa kbob kboe kbok kboo kbpa kbpe kbpk kbpo kbpr kbra kbrb kbre kbrf kbrk kbro kea- keak keap kear keba kebb kebe kebr keef keek keep keer kefa kefb keff kefr keka kekb keke keko keok kep- kepa kepe ker- kera kerb kere kerf kerk kero kerp kerr kfab kfar kfbk kfeb kfer kffa kffb kfff kffk kfka kfkb kfok kfoo kfor kfpr kfra kfre kfro kfrp kfrr kkaa kkap kkar kkba kkbb kkbe kkbo kkbr kkea kkfr kkkk kkoa kkob kkoo kkor kkpk kkrb kkre kkrf kkrk kkro kkrr koab koae koak koap koar koba kobb kobe kobk kobo kobr koea kofa kofe koff kofk kofo kofp koka kokb koke kokf kokk koko kokp kokr koob kook kooo koop koor kopa kopb kope kopf kopp kopr kora korb kore korf kork koro korr kpae kpak kpao kpar kpba kpbb kpbe kpbr kpek kper kpfa kpfk kpfr kpke kpkk kpkr kpoa kpob kpoe kpof kpok kpoo kpop kppk kppo kppp kppr kprb kpre kprf kprk kpro kprp kprr krab krae krak krap krar krba krbb krbe krbk krbr krea kreb kree kref krek kreo krfe krff krfo krfp krka krke krkk krko krkr kroa krob kroe krof krok kroo krop kror krpa krpr krrb krre krrf krrk krro krrr o-eo oaer oafo oake oara oare obak obba obbo obea ober obkb oboe obok obor obra obre obro oepa oera oere ofek ofer off- offa offe offo offr ofor ofra ofre okak okap oker okka okko okok okor okpe okpo okra okre okro ooaa ooak ooba oobe ooer ooff oooo oora oore opap opar opep oper opo- opor oppa oppo opra orab orae orak orao orar orba orbb orbe orbo ore- orea oreb orek oreo orer orfe orff orka orke orko oro- oroe orof orok oror orpe orra orro paak paap paar paba paea paep paer pafa pafe paff paka pake pako papa papb pape papp papr par- para pare parf park paro parp parr pbar pbpa pbpk pbrf peab peak peap pear peba peek peep peer peff peka peke pekk peko peor pepa pepe pepo per- pera pere perf perk pero perp perr pfaa pfff pffr pfkp pfra poak poar poba pobo poea poer poff poka poke poko poof pook poop poor pop- popa pope popo popp pora porb pore pork poro porr ppap ppar pper ppfa ppoa pppa pppo pppp pprf prae prao prar pre- preb pree pref prek prep pro- proa prob proe prof proo prop raab raaf raak raba rabb rabe rabk rabo raef raep raer rafa rafe raff raka rake rakk raob raok raop rapa rape rapp rara rarb rare rarf rark raro rbaf rbbb rbbr rea- reae reaf reak reao reap rear reba rebb rebe rebk rebo reeb reef reek reep refe reff refr reka reke reko reof reop repe repo repp repr rera rere rero rfae rfef rkkf roab roaf roak roap roar rob- roba robb robe robo roea roer rofe roff