b-r-k bbook bo-bo bobko bobok bobr bokko bokok bokor bombo booko boomb borbo borko bormo boro- borok borom boroo borro brmmm brobo brom- bromo brook broom brrrr k-rob ko-ko kokko kokor kombo korbo korom koror korro kromo mboro mmmmm mobor mobro mokko mokro mombo mookk mooro morbo mormo moror morro mrmom mrorr o-r-b oboro obrok obrom okobo okoro omoro ooooo orbom orkom orobo oromo ro-ro robbo robo- robor rokkk