rool room roop roor ropa ropo rora rork roro roru roua rouk roul roum roup rrkm rrmp rrrr rrum ruka rukk ruku rula rulk rull rulo ruma ruml rumm rumo rump ruok rupa rupp rura ruro rurp ruru u-rp uaru uaua ukko ukla ukma ukok ukpa ukra ukum ukup ukur ulaa ulam ular ulla ullo ullr ulma ulmo ulmu ulo- ulua uluk ulul ulum umaa umak umap umar umka umla umma ummo umok umol umor umra uoml uomo uor- upal upar upla uplo upma upml upor uppa uppp uppu upra upup ural urao urap urau urka urla urma uro- uroa urok urol urom uroo urpo urra uruk urum urup urur uulu uuuu