rcbc rccb rccc rcgc rcic rcnr rcrg rebb rebe rebu recc rece reci recm recr recu reeb reem reen rege regi regm regn regr regu reii reim rein reir reiu reme remi remn rene reng reni renn renu rere rerg reri reru reue reuu rgbe rgbi rib- ribe ribu ricc rice riem rien rier rieu rige rigg rigi rigu riin rime rimi rimm rimu rine ring rinn rire riri riue rmrg rnbr rnie rnin rrmc rrrr rrum rrun rubb rube rubi rubu ruce ruci ruen ruer ruge rugg rugi ruin rumb rume rumi rumm runc rune rung runi runn rurc rure ruri ruru ruun u-ie ubbe ubbi uber ubic ubii ubir ucbc ucci ucin ucmc ucrc uein ueir ugcc ugcg ugne ugni ugri ugur uguu uige uirr umb- umbe umbi umec umer ummg umri unbe uncc unce uncg unci uneb unec unee unen uner ungu uni- unic unie unii unin unir unmc unmr unne unni unum urbe urbi urci ure- urge urgi urgu urib uric urie urim urin uriu urmi urne urni urre urri urum urun urur uuen uuni uuri uuuu