bibbo bibio bibri bimbo birmi birou birum birur bmiii bo-bo bobbi bobr bobri boiro bombo boomb booru borbo borim borio bormo boro- borom boroo borou borro borum bouri brimm brimo briou brmmm brobo brom- bromo broom brrrr bruiu brumm bruri bumbo bumbu burim burio buroo burri burro burru buumi i-m-r ibbur ibibo iiiii iommi ioooi ioooo iorio irimi irobo irori irour mbiri mbori mboro mburu mi-mi mibor mimbo mimio mimir mimmi mimo- miour mirim mirri mmiii mmmmm mobor mobro mombi mombo mombu momir momoi moooi moori mooro morbi morbo morib morio mormo moroi moror morou morro morum mouri mrmom mrorr muiri mumbi mumbo mummu murmi muroi murom muror murri murro murru murum o-r-b obimo oboro obrom omoro ooioo ooooo orbom oribi orium ormur orobo oromo orrum oruro ouir- ouoro ribbi ribo- rimbo rimmi rimou rimur ro-ro robbi robbo robo- robor robur roomu rorbu roumi roumm rubbi rubim rubio rubor ruiru rumbo rummi rummo rummu rumor ruomu ubirr ubobo uiro umbri umbro umiri umour uromi uroob urour urubu urumi ururi uuuuu