orge orgo ori- orid orie orig orio orme ormo oro- oroe orom oror orri orro orub orum oude oued ouer ouge ouie ouii ouir oume oumi our- oure ouro ouu- rbbb rbbr rdbm rder rdio rebb rebe rebo rebu redd rede redi redo redr redu reeb reed reem regd rege regi regm rego regr regu reid reii reim reir reiu reme remi remo reod reog reou rerd rere rerg reri rero reru reue reuu rgbe rgbi rib- ribe ribo ribu ridd ride ridi rido ried riem rier rieu rige rigg rigi rigo rigu rime rimi rimm rimo rimu riom riou rire riri riue rmrg rob- robb robe robi robo robu rodd rode rodi rodo roed roeg roer roge rogg rogi rogo roid roig roio roir roiu romb romd rome romi romm romo roob rood roog rooi room roor rore rori roro roru roub roud roue roum rred rrrr rrum rubb rube rubi rubu rudd rude rudi rudo rued ruer ruge rugg rugi ruid rumb rume rumi rumm rumo rurd rure ruri ruro ruru ruud u-ie ubbe ubbi ubbo uber ubid ubii ubir ubod ubud uddi udem uder udgb udge udid udig udim udir udoo ueir ugeo uggo ugod ugri ugro ugur uguu uige uirr umb- umbe umbi umbo umde umer umgo ummg ummo umoe umor umri uomo uor- uore urbe urbi urde urdu ure- ured urge urgi urgu urib urie urim uriu urmi uro- urom uroo urre urri urum urur uuri uuuu