bbbee be-er be-ro beber beebe beeve bembe bembo bemer beour berbe berme bermo berob beroe berom beror berre berru berum beuer beure beuve bever bevor bevue bo-bo bobov bobr bobre boeme boero boeur bombe bombo bomer bomme booer boomb boore booru borbo boree borer bormo boro- borom boroo borou borov borre borro borum borve borvo bouee bouer boure bovee brebu breem breer breme bremm bremo breo- brere breu- breve brmmm brobo broer brom- brome bromo broom broue brrrr bruer brume brumm bubbe buber bumbo bumbu bumme buroo burov burro burru ebber eboue ebure eeeee eevee eever embee ember embro embue emeer emere emmer emore emove emure eomer eorre erbbe erber erem- eremo erere ereve erome eroom eroor erore error ervum eubro eum-u euro- eurre evere evero everr eveve evome evoor evour mbebe mbere mboro mbube mburu mbuvu mebbe meebo meemu meere meeve membe memer memor merer mero- meroe merom meroo meror merre merur merve meuer meure meuro meuve mmmmm mobee mobme mobor mobro moeer moeme moere moero moeve mombo mombu momme momoe mooer moore mooro moove morbo moree morem morer morev mormo moror morou morre morro morue morum moure mover mreru mrmom mrorr mumbe mumbo mumme mummu mureu murom muror murre murro murru murum o-r-b oboro oboue obreb obrom obrov oerme oerum ombe- omber ombre omemo omero omore omoro oo-er ooooo oovoo orbom oreo- orere orero ormer ormur orobe orobo oroer orome oromo orrum orube oruro oueme oumer ouoro oure- ouver ouvre over- overo rebbe reber reeme reemo reere reeve remee remer remor remou remue reome rere- reree rerob rerum reuer reume rever revue ro-ro robbe robbo rober robo- robor robur roero rombe romeo romer romme rooer roome roomu roore rooue roove rorbu rorem rorer rouer roume roumm roure rover rubee ruber rubor ruere rumbe rumbo rumer rummo rummu rumor ruomu uber- ubobo ubume umbe- umber umbre umbro umeer umeme umevu umore umour uouee ureme ureo- uroob urour urubu uuuuu uvrou v-bob v-bor veber vebre veere veeve vembu verbo vereb verme vermo verre verum verve veuve veveo vever voere vomer voobu voore vooru vorbe vorme vorre voure vrbov vreme vromb vroom vuere vuver