a-do a-fu aaaa aaab aaad aaaf aaal aaar aaba aabb aabd aabl aada aadu aafa aafb aafd aaff aafl aala aald aall aalo aalu aaoo aara aard aaro aaru abaa abab abad abaf abal abar abau abb- abba abbb abbo abbr abda abdo abdu abff abla ablo aboa abob abod abof abol aboo abor abou abra abro abua abud abuf abul adaa adab adad adal adao adar adba adda addd addl addo addr addu adfa adfl adob adod adoo ador adra adro adua adub adur afaa afad afao afar afdb afdl affa affo afla afoa afol afoo afor afr- afra afro afru afua afud alaa alad alal alao alar alau alb- alba albo albu ald- alda aldl aldo alfa all- alla alll allo allr allu aloa alod alof alol aloo alor alou alro alua aluf alur aoba aola aora aorb aouf aoul arab arad araf aral arar arau arba arda ardf ardl ardo ardu arfa arfb arff arfu arla arlo aroa arob arod aroo aror arr- arra arro arrr arru arua arub arud arul auaa audo aul- aula auld aulf aull aulo aulu auol aur- aura aurd auro baaa baad baaf baal baar baba babb babo babr babu bada badb badd bado badr badu baff bafo bala bald balf ball balo balu baol bar- bara barb bard barf baro barr baru bau- baud bauf baul baur bbad bbau bbbb bbdd bbdo bblb bd-r bduf bffl blaa blab blad blau bldr blob blod bloo blou blub blud bluf blur boab boad boal boar boba bobb bobo bobu boda bodb bodo bodu bofa bofd boff bofu bola bold boll bolo bolu boob bood boof bool boor bor- bora bord borf boro borr boru boua boud bouf boul bour brab brad braf brao brau brda brdo brfu broa brob brod brol broo bror brou brrr brud buad bual buar buba bubb bubo bubu buda budb budd budl budo budu buff bufo bufr bula bulb buld bull bulu buol bur- bura burb burd burl buro burr buru d-bo daab daad daal daar daau daba dabb dabo dabu dada dado dadu dafa daff dafo dala dalf dall dalo dalu daou dara darb dard darf darl daro darr daru daub daud daur dbar dbfo dddd ddub dfaf dffa dfrf dlab dlbd doab doal doar doba dobb dobl dobu dod- doda dodd dodo doff dola dold dolf doll dolo dolu doob dood doof dool door dora dord dorf doro dorr doru doub doud douf doul dour draa drab drad draf drar drau drba drda drob drod drof drol drou drra drua drub druu duaa duab duad dual duar dub- duba dubb dubu duda dudd dudo dudu duff dufu dula dull dulo dulu duo- dura duro duru duul duur faaa faad faba fabd fabo fabu fada fadd fado fafa faff fafo fala fald fall falo falu fara farb fard farl faro farr faru faud faul faur fbar fbla fdlr fdoa ffar ffff ffrr flab flad flao fldr flob flod floo flor flou flub flud fluf fluo flur foad foaf foal foar foba foda fofo fola fold foll folo folr food foof fool for- fora forb ford forl foro forr foua foud foul four frab frad frau frla frob frol frou frub fuad fuar fubb fubu fuda fudd fuff fufu fula full fulu fuor fur- fura furl furo furr laaa laad laal laar laba labo labr labu lada ladd lado ladu lafb laff lala lald lall lalo lalu laou lara larb lard larf larr laru laub laud lauf laul laur lbar lblr lfrd llao lldb llll lloa llod lloo llud load loaf loar lob- loba lobb lobo loda lofa loff lola lold loll lolo loob lood loof lool loor lora lord loro loud loul lour louu lral lrba lrdd lrrr luau luba luda ludd ludo luff lufu lula lull lulu lura lurd luua oaau oafo oall oara obad obal obba obbo obla oblu obol obor obra obro odal odbo odda oddd odla odoo odor odou odra odrl odur ofdr off- offa offo offr offu ofla ofor ofra olaf olar olba olbo oldb olfa olla ollo olof olor olur ooaa ooba ooda ooff oola oold oolo oooo oora oord orab orad oral orao orar orba orbb orbo orbu orda ordo ordu orff orfu orla orlo orlu oro- orof oror orra orro orub ouad ouff oula ould oulu our- oura ouro ouu- raab raad raaf raba rabb rabl rabo rabu rada radd radl rado radr radu rafa raff rala ralb ralf rall ralo raob raol rara rarb rarf raro raua raub raud rauf raul rbaf rbbb rbbr rdfa rffl rlab rlua roab road roaf roar rob- roba robb robo robu roda rodd rodo roff rofl rofo rola rold rolf roll rolo roob rood roof rool roor rora roro roru roua roub roud rouf roul rrad rrrr ruad ruba rubb rubu ruda rudd rudl rudo rufa ruff rufo rula rull rulo rura rurd ruro ruru ruud uafa uald uaru uaua ubal ubar ubba ubbo ubla ublo ubod ubra ubud udaa udad udal udar udau udoo udra uffa ufra ulaa ulad ular ulla ullo ullr ulo- ulua ulul uofa uofl uofo uor- urad ural urao urau urba urda urdu urfa urff urla uro- uroa urol uroo urra urur uulu uuuu