mrbm mrca mrcb mrcc mrce mreb mree mrkr mrmc mrrc mruk muac muak muar mube muc- mucc muce muck mucu muee muka muke muma mume mumm mumu mura murc mure murk murr muru raab raak raam raba rabb rabe rabk rabu rac- raca racc race rack racu raec raer raka rake rakk raku rama ramb rame ramm ramu rara rarb rare rark raua raub rauc raue rauk raum rbbb rbbr rbmk rcac rcbc rccb rccc rea- reac reae reak ream rear reau reba rebb rebe rebk rebu reca recc rece reck recm recr recu reeb reek reem reka reke rema reme rera rere reru reue reuk reuu rrkm rrmc rrrr rrum ruba rubb rube rubu ruca ruce ruck ruer ruka ruke rukk ruku ruma rumb rume rumm rura rurc rure ruru uabc uaca uamc uarc uaru uaua ubac ubar ubba ubbe ubek uber ubra ucak ucam ucar ucbc ucca ucea ucka ucmc ucrc ucua ueba ukba ukcc ukek ukeu ukma ukra ukrc ukum ukur umaa umac umak umar umb- umba umbe umec umer umka umma umra urac urau urba urbe urca ure- urea urka urke urma urra urre uruk urum urur uuuu