bbbee be-er be-ro beber beebe bembe bembo bemer berbe berme bermo berob beroe berom beror berre bo-bo bobr bobre boeme boero bombe bombo bomer bomme booer boomb boore borbo boree borer bormo boro- borom boroo borre borro breem breer breme bremm bremo breo- brere brmmm brobo broer brom- brome bromo broom brrrr ebber eeeee embee ember embro emeer emere emmer emore eomer eorre erbbe erber erem- eremo erere erome eroom eroor erore error mbebe mbere mboro mebbe meebo meere membe memer memor merer mero- meroe merom meroo meror merre mmmmm mobee mobme mobor mobro moeer moeme moere moero mombo momme momoe mooer moore mooro morbo moree morem morer mormo moror morre morro mrmom mrorr o-r-b oboro obreb obrom oerme ombe- omber ombre omemo omero omore omoro oo-er ooooo orbom oreo- orere orero ormer orobe orobo oroer orome oromo rebbe reber reeme reemo reere remee remer remor reome rere- reree rerob ro-ro robbe robbo rober robo- robor roero rombe romeo romer romme rooer roome roore rorem rorer