a-do aaaa aaab aaad aaar aaba aabb aabd aada aadu aaoo aara aard aaro aaru abaa abab abad abar abau abax abb- abba abbb abbo abbr abda abdo abdu aboa abob abod aboo abor abou abox abra abro abua abud adaa adab adad adao adar adba adda addd addo addr addu adob adod adoo ador adox adra adro adua adub adur aoba aora aorb arab arad arar arau arax arba arda ardo ardu aroa arob arod aroo aror arr- arra arro arrr arru arua arub arud auaa audo aur- aura aurd auro auxa axar axo- axoa axxo ba-x baaa baad baar baba babb babo babr babu bada badb badd bado badr badu bar- bara barb bard baro barr baru barx bau- baud baur baux bbad bbau bbbb bbdd bbdo bbox bd-r boab boad boar boba bobb bobo bobu boda bodb bodo bodu boob bood boor boox bor- bora bord boro borr boru boua boud bour boxa brab brad brao brau brax brda brdo broa brob brod broo bror brou brox brrr brud brux buad buar buba bubb bubo bubu buda budb budd budo budu bur- bura burb burd buro burr buru buxa d-bo daab daad daar daau daba dabb dabo dabu dada dado dadu daou dara darb dard daro darr daru daub daud daur daux dbar dddd ddub do-x doab doar doba dobb dobu dod- doda dodd dodo doob dood door dora dord doro dorr doru doub doud dour doux doxa draa drab drad drar drau drax drba drda drob drod drou drra drua drub druu duaa duab duad duar dub- duba dubb dubu duda dudd dudo dudu duo- dura duro duru duur dxab dxbr dxdr dxra dxrd dxrr dxrx dxur dxxr dxxx oaau oara obad obba obbo obor obox obra obro odax odbo odda oddd odoo odor odou odra odur ooaa ooba ooda oooo oora oord orab orad orao orar orba orbb orbo orbu orda ordo ordu oro- oror orra orro orub ouad our- oura ouro ouu- oxa- oxo- oxox oxud oxxo raab raad raba rabb rabo rabu rada radd rado radr radu radx raob rara rarb raro raua raub raud raxa rbbb rbbr roab road roar rob- roba robb robo robu roda rodd rodo roob rood roor roox rora roro roru roua roub roud roux roxa roxo rrad rrrr ruad ruba rubb rubu ruda rudd rudo rura rurd ruro ruru ruud uaru uaua ubar ubba ubbo ubod ubra ubud udaa udad udar udau udoo udox udra uor- urad urao urau urba urda urdu uro- uroa uroo urox urra urur uuuu uxor xaar xado xara xbar xbox xbra xoro xoxo xrdb xrod xuda xura xuxa xuxu xxxo xxxx