bo-bo bobov bobr bombo boomb boort booru borbo bormo boro- borom boroo borot borou borov borro borum borut borvo botom botou botro bottu bouto brmmm brobo brom- bromo broom broto brout brrrr brumm btr-t bumbo bumbu buroo burov burro burru burtt burut buto- butor butot butou butov butuo butut mboro mburu mbuvu mmmmm mobor mobot mobro mobtv mombo mombu momot mooro mooto morbo mormo moror morou morro morum morut moto- motor motru motto mottu mrmom mrorr mt-tm mt-tr mt-tt mt-tv mtoto mumbo mummu murom muror murot murro murru murum murut muto- mutum mutuo muuto o-r-b oboro obout obrom obrov omoro omoto omout ooooo oovoo orbom orbot ormur orobo oromo orout orrum ortoo oruro orutu otomo ototo otour otrov ottom ottov ottur oubut ouoro outro outto outtv rmutt ro-ro robbo robo- robor robot robrt robur roomu rorbu roto- rotor rotot rotto roubt roumm routt rttov rubor rumbo rummo rummu rumor ruomu ruutu tbtbt tbutt tobor tobot tobou tombo tombu tommo tomo- tomom tomor tomov torob torro torto tortu toto- totoo totum touro tromm trott troum trout trovo trubu truro trutv truvo ttttt tu-mo tubo- tubou tumbo tumbu tummo tumor tumut tuomo tuotu turbo turbt turot turov turro turtu turut turvo tutor tutto tuuru tvmom ubobo umbro umour uroob urour urubu urutu utro- utror utrum uttur uturu ututo uuuuu uvrou v-bob v-bor voobu vooru votto votum vrbov vromb vroom vurot vutov