-ous aaaa aaab aaar aaas aaav aaba aabb aaoo aara aaro aars aaru aasa aass aasu aaus aava abaa abab abar abas abau abb- abba abbb abbo abbr abbs aboa abob aboo abor abos abou abov abra abro abrs abs- absa abss absu abua abus abva aoba aora aorb aors aoss aous arab arar aras arau arba arbs aroa arob aroo aror aros arr- arra arro arrr arrs arru ars- arsa arso arsu arua arub arva arvo asaa asab asao asar asas asau asba asbo asbu asob asor asos asou asra asro asrs asru assa asso assr asss assu asub asur asus asva asvs auaa aur- aura auro ausa ausu auvs avab avao avar avas avor avos avou avra avro avur avus avva avvo baaa baar baas baba babb babo babr babs babu baos bar- bara barb baro barr bars baru basa baso bass basu bau- baur bava bavu bbas bbau bbbb bbbs boab boar boas boba bobb bobo bobs bobu boob boor boos bor- bora boro borr bors boru bosa boso boss bosu boua bour bous bova bovo brab brao bras brau brav broa brob broo bror bros brou brrr brrs brsb brsr brus bruv bsaa bsas bsos bsra buar buba bubb bubo bubs bubu bur- bura burb buro burr burs buru busa buss busu buus oaau oara oars oass oavs obas obba obbo obor obos obra obro obsr obss obus obvs ooaa ooba oooo ooos oora oosa oous orab orao orar oras orav orba orbb orbo orbs orbu oro- oror oros orra orro orrs orsa orso orsu orub orus orvr orvs osar osas osba osoo osor osos osov osro ossa ossb osso ossu oubs our- oura ouro ours ousa ouu- ovar ovo- ovoo ovra raab raas raba rabb rabo rabs rabu raob raos rara rarb raro rars rasa raso rass rasu raua raub raus rava rbbb rbbr rbbs rbss roab roar roas rob- roba robb robo robs robu roob roor roos rora roro roru rosa roso ross roua roub rous rova rovo rovs rras rrrr rsaa rsos rssa rsua ruas ruba rubb rubs rubu rura ruro rurs ruru rusa ruso russ rusu ruvu s-os saab saar saas saba sabb sabo sabr sabs sabu saor saos saou sara saro sarr sars saru sarv sasa saso sass saua saur saus sava savo savs savu sbaa sbar sbas sbbs sbor sbsa sbus soar soas soba sobo sobr sobs sobu soor soos sora sorb soro sorr sors soru sosa soso soss sosv sour sous sova sovo sovs sovu sras sros srub ssaa ssab ssao ssas ssau ssbr ssra ssrs sssa sssb ssss suar suas sub- suba subb subo subs suor suos sur- sura suro surr surs suru surv sus- susa suso suss susu suus suva suvs svar svor uars uaru uasa uaua uavs ubar ubba ubbo ubos ubra uor- uovo urao uras urau urba urbs uro- uroa uroo urra ursa urso urss ursu urur urus urva us-a usaa usar usas usba usbr usbs usos usov usra ussa ussb ussr usss ussu usua usus uuuu uv-a uv-b uvaa uvas uvvu vaar vaas vabs vara varr vars varu vas- vasa vaso vass vasu vaus vava vavs voar voor vor- vora voro vors voru vosa voso voss vosu vour vous vras vrav vrba vrsa vurb vvob vvsb vvvv