rion riou riri rnag rnai rnco rnin roag roan roar roca rocc roco roga rogg rogi rogo roia roig roin roio roir roiu rona ronc rong roni rono roog rooi roon roor rora rorc rori roro roru roua roun rrna rrrr rrun ruag ruan ruca ruci ruga rugg rugi ruin runa runc rung runi runn runo rura rurc ruri ruro ruru ruun uaca uair uang uaoc uarc uaru uaua ucai ucan ucar ucca ucci ucin ucio ucon ucrc ucua ugao ugar ugcc ugcg uggo ugia ugni ugra ugri ugro ugur uguu uica uira uirr unaa unac unai unan unar unau unca uncc uncg unci unco unga ungo ungu uni- unia unic unii unin unio unir unna unni unno unon unra unro uocc uor- urac urai uran urao urau urca urci urga urgi urgu uria uric urin uriu urna urni uro- uroa uroo urra urri urun urur uuni uuno uuoc uuri uuuu