bbbb bbdd bbdo bd-r bdrm bmdb bobb bobo bodb bodo bomb boob bood boom boor booz bor- bord borm boro borr borz bozo brdm brdo brob brod brom broo bror broz brrm brrr bzzz d-bo dddd dmoz dmrb dobb dod- dodd dodo domb domm domo doob dood doom door dord dorm doro dorr dozo drob drod drom droz dzbb dzbm dzmb dzmz dzor dzrm dzrr mbdb mddm mmdb mmmd mmmm mmod mmor mobb mobo modd modo momo moob mood moor morb mord moro mozo mrbb mrbm mrdd mrmd mroz obbo obor obro odbo oddd odmr odom odoo odor ombo omdb omo- omoo omor omro oooo oord orbb orbo ordo ormo oro- orom oror oroz orro orzo ozd rbbb rbbr rdbm rob- robb robo rodd rodo romb romd romm romo roob rood room roor rooz roro rozz rrrr z-ro zobo zodd zomb zomo zoo- zoom zorb zord zoro zozo zzzz