rrah rrna rrrr rrun ruah ruan ruca ruce ruch ruen ruer ruhe ruhh ruhn ruhr runa runc rune runn rupa rupe rupp rura rurc rure rurp ruru ruun u-rp uaca uarc uaru uaua ucan ucar ucca uccp ucea ucha uche ucpa ucph ucrc ucua uher uhna uhuh uhup unaa unac unan unar unau unca uncc unce unch uncp unec unee unen uner unha unna unne unpa unpc unra upac upar upca upen upne upnp uppa uppc uppe uppp uppu upra upup urac uran urap urau urca urch ure- urea ureh urna urne urra urre urrh urun urup urur uucp uuen uuuu