bdoor bo-bo bobr bodd- bodog bodor bogor bogu bogud bogur boord booru borbo bordo borgo borgu boro- borod boroo borou borro boudu bourd bourg brobo brodd brodo brood broud brrrr brud- brugg buddu budur bugoo buord burgo burgu buroo burro burru burud d-rod ddddd do-do dobro dodoo dodro dogbo doggo doodo dorog dorud douro drbob drobo drog- drogo drood droog droug drugu dubbo duddo dudou go-go go-oo gobbo goddo godor gogro goobo goodg goodo goord gordo gorgo gorod gourd grgur grodd grogg grood groud grrrr grubb gubbo gubru guddu gudur guroo gurro gurur o-dog o-r-b obodo oboro obudu oddur odour odudu oduro ogogo ogugu ooooo ordro orobo orodo orrgo oruro ouoro ro-ro robbo robo- robor robur rodbo rodor roodu rorbu rubor u-dub u-god ubobo ugro- ugrug urdog uroob urour urubu uuuuu