a-fu aaaa aaab aaaf aaal aaar aaba aabb aabl aafa aafb aaff aafl aala aall aalo aalu aaoo aara aaro aaru abaa abab abaf abal abar abau abb- abba abbb abbo abbr abff abla ablo aboa abob abof abol aboo abor abou abra abro abua abuf abul afaa afao afar affa affo afla afoa afol afoo afor afr- afra afro afru afua alaa alal alao alar alau alb- alba albo albu alfa all- alla alll allo allr allu aloa alof alol aloo alor alou alro alua aluf alur aoba aola aora aorb aouf aoul arab araf aral arar arau arba arfa arfb arff arfu arla arlo aroa arob aroo aror arr- arra arro arrr arru arua arub arul auaa aul- aula aulf aull aulo aulu auol aur- aura auro baaa baaf baal baar baba babb babo babr babu baff bafo bala balf ball balo balu baol bar- bara barb barf baro barr baru bau- bauf baul baur bbau bbbb bblb bffl blaa blab blau blob bloo blou blub bluf blur boab boal boar boba bobb bobo bobu bofa boff bofu bola boll bolo bolu boob boof bool boor bor- bora borf boro borr boru boua bouf boul bour brab braf brao brau brfu broa brob brol broo bror brou brrr bual buar buba bubb bubo bubu buff bufo bufr bula bulb bull bulu buol bur- bura burb burl buro burr buru faaa faba fabo fabu fafa faff fafo fala fall falo falu fara farb farl faro farr faru faul faur fbar fbla ffar ffff ffrr flab flao flob floo flor flou flub fluf fluo flur foaf foal foar foba fofo fola foll folo folr foof fool for- fora forb forl foro forr foua foul four frab frau frla frob frol frou frub fuar fubb fubu fuff fufu fula full fulu fuor fur- fura furl furo furr laaa laal laar laba labo labr labu lafb laff lala lall lalo lalu laou lara larb larf larr laru laub lauf laul laur lbar lblr llao llll lloa lloo loaf loar lob- loba lobb lobo lofa loff lola loll lolo loob loof lool loor lora loro loul lour louu lral lrba lrrr luau luba luff lufu lula lull lulu lura luua oaau oafo oall oara obal obba obbo obla oblu obol obor obra obro off- offa offo offr offu ofla ofor ofra olaf olar olba olbo olfa olla ollo olof olor olur ooaa ooba ooff oola oolo oooo oora orab oral orao orar orba orbb orbo orbu orff orfu orla orlo orlu oro- orof oror orra orro orub ouff oula oulu our- oura ouro ouu- raab raaf raba rabb rabl rabo rabu rafa raff rala ralb ralf rall ralo raob raol rara rarb rarf raro raua raub rauf raul rbaf rbbb rbbr rffl rlab rlua roab roaf roar rob- roba robb robo robu roff rofl rofo rola rolf roll rolo roob roof rool roor rora roro roru roua roub rouf roul rrrr ruba rubb rubu rufa ruff rufo rula rull rulo rura ruro ruru uafa uaru uaua ubal ubar ubba ubbo ubla ublo ubra uffa ufra ulaa ular ulla ullo ullr ulo- ulua ulul uofa uofl uofo uor- ural urao urau urba urfa urff urla uro- uroa urol uroo urra urur uulu uuuu