ordo ordu ore- oreb ored orel oreo orer orfe orff orfi orfu ori- orid orie orif oril orio orle orlo orlu oro- oroe orof oror orri orro orub oude oued ouer oufe ouff ouie ouii ouir ould oule oulu our- oure ouro ouu- rbbb rbbr rble rder rdio rebb rebe rebo rebu redd rede redi redl redo redr redu reeb reed reef reel refd refe reff refi refl refr refu reid reif reii reil reir reiu relb reld rele rell relo reod reof reol reou rerd rere reri rero reru reue reuf reul reuu rfdi rfef rffl rfid rib- ribe ribo ribu ridd ride ridi rido ried rief riel rier rieu rife riff rifu riif rile rill rilo rilu riol riou rire riri riue rlee rlef rleu rlif rob- robb robe robi robo robu rodd rode rodi rodo roed roel roer rofe roff rofl rofo roid roif roil roio roir roiu rold role rolf roll rolo roob rood roof rooi rool roor rore rori roro roru roub roud roue rouf roul rred rrif rrle rrrr rubb rube rubi rubu rudd rude rudi rudl rudo rued ruel ruer rufe ruff rufo ruid ruif rule rull rulo rurd rure ruri ruro ruru ruud u-ie ubbe ubbi ubbo uber ubid ubii ubir uble ubli ublo ubod ubud uddi udel uder udid udir udoo ueir uele ueli uell ufel ufer uffe uile uirr ulde uleb ulee uleo ulfe ulie ulle ulli ullo ullr ulo- ulul uofl uofo uor- uore urbe urbi urde urdu ure- ured urfe urff urfi urib urie urif uriu urle uro- urol uroo urre urri urur uulu uuri uuuu