bloom bloor blorb blurb blurr bo-bo bobr boll- bollo bollu bombo bomlo boomb booru borbo bormo boro- borom boroo borou borro borul borum boul- boulo bouml brmmm brobo broll brolo brom- bromo brool broom brrrr brull brumm bulb- bull- bulou bulul bumbo bumbu burol buroo burro burru lbomb lobbo lobo- lobor lollo lolol lombo loobu loomb lorom lorum louro lubur lulom lulul lumb- lumbo mbolo mboro mbulu mburu mmmmm mobor mobro mollo mollu molor mombo mombu momlu mooll moolu mooro morbo mormo moror morou morro morum moulu mrmom mrorr mullo mulur mumbo mumlu mummu murlo murol murom muror murro murru murum o-r-b obolo oboro obrom ollur olomu olour olumu omoro omulu ooooo orbom ormur orobo orolu oromo orrum oruro oullo ouoro ourol ro-ro robbo robo- robor robur rollo rolmo roomu rorbu roull roumm rubor rullo rumbo rummo rummu rumor ruomu ubobo ullur ulrum ululu uluru umblu umbro umour uroob urour urubu uuuuu