rcnr rea- reac reae real rean rear reau reba rebb rebe rebu reca recc rece recr recu reeb reel reen rela relb rele rell rena rene renn renu rera rere reru reue reul reuu rlab rlee rleu rlua rnal rnbr rrle rrna rrrr rrun ruan ruba rubb rube rubu ruca ruce ruel ruen ruer rula rule rull runa runc rune runn rura rurc rure ruru ruun uabc uaca uarc uaru uaua ubac ubal ubar ubba ubbe uber ubla uble ubra ucal ucan ucar ucbc ucca ucea ucel ucla ucrc ucua ueba uele uell ulaa ulae ulan ular ulbc ulcc ulea uleb ulee ulen ulla ulle ullr ulna ulne ulua ulul unaa unac unal unan unar unau unbe unca uncc unce uncl uneb unec unee unen uner unle unna unne unra urac ural uran urau urba urbe urca ure- urea urla urle urna urne urra urre urun urur uuen uulu uuuu