ouu- ovan ovar ovda ovo- ovod ovon ovoo ovra raab raad raan raba rabb rabo rabu rac- raca racc raco racu racv rada radc radd rado radr radu rana ranc rand rann rano raob raoc rara rarb raro raua raub rauc raud raun rava rbbb rbbr rcac rcbc rcbo rccb rccc rcdc rcnr rcon rcrd rcuv rcvr rdac rdna rdoc rnbr rnco rndc rnod roab road roan roar rob- roba robb robo robu roca rocc roco roda rodd rodo rona ronc rond rono roob rood roon roor rora rorc roro roru roua roub roud roun rova rovo rrad rrna rrrr rrun ruad ruan ruba rubb rubu ruca ruda rudd rudo runa runc rund runn runo rura rurc rurd ruro ruru ruud ruun ruvu rv-c rvca uabc uaca uaoc uarc uaru uaua ubac ubar ubba ubbo uboc ubod ubon ubra ubud ucad ucan ucar ucav ucbc ucca ucdc ucdd ucon ucrc ucua udaa udad udar udau udbc udca udon udoo udra udun unaa unac unan unar unau unbd unca uncc unco unda undo unna unno unon unov unra unro uocc uor- uovo urac urad uran urao urau urba urca urda urdu urna uro- uroa uroo urra urun urur urva uuno uuoc uuuu uv-a uv-b uv-c uvaa uvac uvda uvrd uvvu vaad vaan vaar vaca vaco vada vado vadu vana vanc vand vann vano vanu vara vard varn varr varu vaud vava vbcc vcon vdcc vdub vnav voad voar voca voda vodo vona vond vonn vooc voor vor- vora vord voro voru voud voun vour vrac vran vrav vrba vrnn vroc vron vuca vuco vuda vudu vuno vurb vvob vvvv