b-r-k bbook bdoor bo-bo bobko bobok bobr bodd- bodor bokko bokod bokok bokor booko boord booru borbo bordo borko borku boro- borod borok boroo borou borro boudu bouko bourd brobo brodd brodo brood brook broud brouk brrrr brud- buddu budko budur bukk- bukor buord buroo burro burru burud buruk d-rod d-rok ddddd ddruk do-do dobok dobro dodoo dodro dokdo dokuo doodo dooku dorud doruk douro drbob drobo drood drook drouk du-ku dubbo duddo dudok dudou duduk dukku durok k-b-d k-rob ko-ko kobru kobuk kodok kodur kokko kokor kokou kokur koord kooru korbo korku koror korro koruk koudo krodo kubok kudou kudur kukko kukok kukur kurbu kurku kurud kuruk o-r-b obodo oboro obrok obudu oddur odour odudu oduro okkur okobo okoro okubo okuku okuru ooooo ordro orobo orodo oruku oruro ouoro ro-ro robbo robo- robor robur rodbo rodok rodor rokkk roodu rorbu rouko rubor rudkk rudok u-dub ubobo ukobu ukodo urduk uroob urour urubu uuork uuuuu