rlcg rlee rleu rlua rlug rnag rnal rrle rrna rrrr rrun ruag ruan ruca ruce ruel ruen ruer ruga ruge rugg rula rule rull runa runc rune rung runn rura rurc rure ruru ruun uaca uang uarc uaru uaua ucal ucan ucar ucca ucea ucel ucla ucrc ucua uele uell ugal ugar ugcc ugcg ugne ugra ugur uguu ulaa ulae ulan ular ulcc ulea ulee ulen ulla ulle ullr ulna ulne ulua ulul unaa unac unal unan unar unau unca uncc unce uncg uncl unec unee unen uner unga ungu unle unna unne unra urac ural uran urau urca ure- urea urga urge urgu urla urle urna urne urra urre urun urur uuen uulu uuuu