a-do aaaa aaab aaad aaap aaar aaba aabb aabd aabp aada aadu aaoo aapa aapo aara aard aaro aarp aaru aaup abaa abab abad abap abar abau abb- abba abbb abbo abbr abda abdo abdu aboa abob abod aboo abor abou abpa abpd abpp abpr abra abro abua abud adaa adab adad adao adap adar adba adda addd addo addr addu adob adod adoo ador adp- adra adro adua adub adur aoba aopo aora aorb apao apap apar apba apbr apda apdd apdu apo- apod apoo apop apor apou appa appd appr appu apra apro apua apud apup arab arad arap arar arau arba arda ardo ardu aroa arob arod aroo aror arpa arpu arr- arra arro arrr arru arua arub arud arup auaa audo aur- aura aurd auro baaa baad baar baba babb babo babr babu bada badb badd bado badr badu bapa bapp bapu bar- bara barb bard baro barr baru bau- baud baur bbad bbau bbbb bbdd bbdo bbpr bd-r boab boad boar boba bobb bobo bobu boda bodb bodo bodu boob bood boop boor bopa bopp bor- bora bord boro borr boru boua boud boup bour bpda bprd brab brad brao brau brda brdo broa brob brod broo bror brou brrr brud brup buad buar buba bubb bubo bubu buda budb budd budo budu bupa bur- bura burb burd buro burp burr buru d-bo daab daad daap daar daau daba dabb dabo dabp dabu dada dado dadu daou dapa dapp dapu dara darb dard daro darp darr daru daub daud daur dbar dbpd dddd ddpo ddub doab doap doar doba dobb dobu dod- doda dodd dodo doob dood doop door dopa dopo dopp dopr dora dord doro dorp dorr doru doub doud doup dour dpaa dppa draa drab drad drap drar drau drba drda drob drod drop drou drra drua drub drup druu duaa duab duad duar dub- duba dubb dubu duda dudd dudo dudu duo- dupa dupo dura duro duru duur oaau oara obad obba obbo obor obra obro odbo odda oddd odoo odop odor odou odra odrp odur ooaa ooba ooda oooo oora oord opap opar opo- opor oppa oppo opra opua orab orad orao orar orba orbb orbo orbu orda ordo ordu oro- oror orra orro orub orup ouad oupa our- oura ouro ouu- paap paar paba pabu pada padd pado padu papa papb papp papr par- para pard paro parp parr paru paua paud paup paur pbar pbpa pdpa pdpr poad poar poba pobo pod- poda podd podo podu pood poop poor pop- popa popo popp pora porb poro porr poud poup pour ppad ppap ppar ppoa ppod pppa pppd pppo pppp ppru ppur prad prao prar prau pro- proa prob prod proo prop prou prpd prrd prud pruu puao puar pubu pudo pudu pupa pupu pur- pura purb puro purp purr puru raab raad raba rabb rabo rabu rada radd rado radr radu raob raop rapa rapd rapp rara rarb raro raua raub raud raup rbbb rbbr rdap rdbp roab road roap roar rob- roba robb robo robu roda rodd rodo roob rood roop roor ropa ropo rora roro roru roua roub roud roup rpdp rpob rrad rrrr ruad ruba rubb rubp rubu ruda rudd rudo rudp rupa rupp rura rurd ruro rurp ruru ruud u-rp uaru uaua ubar ubba ubbo ubod ubra ubud udaa udad udar udau udoo udop udpd udra uor- upar upda updo upor uppa uppp uppu upra upup urad urao urap urau urba urda urdu uro- uroa uroo urpo urra urup urur uuuu