rnhl rrah rrle rrmc rrna rrrr rrum rrun ruah ruan ruba rubb rube rubu ruca ruce ruch ruel ruen ruer ruhe ruhh ruhl ruhm ruhn ruhr rula rule rull ruma rumb rume ruml rumm runa runc rune runn rura rurc rure ruru ruun uabc uaca uamc uarc uaru uaua ubac ubal ubar ubba ubbe uber ubla uble ubra ucal ucam ucan ucar ucbc ucca ucea ucel ucha uche ucla ucmc ucrc ucua ueba uele uell uhcl uher uhle uhna uhuh ulaa ulae ulam ulan ular ulbc ulcc ulch ulea uleb ulee ulen ulla ulle ullr ulma ulme ulmu ulna ulne ulua ulul ulum umaa umac uman umar umb- umba umbe umec umer umla umma umra unaa unac unal unam unan unar unau unbe unca uncc unce unch uncl uneb unec unee unen uner unha unle unma unmc unmr unna unne unra unum urac ural uran urau urba urbe urca urch ure- urea ureh urla urle urma urna urne urra urre urrh urum urun urur uuen uulu uuuu