bdoor bhood bhour bhrrd bo-bo bo-ho bobr bodd- bodor bohor boodh boord booru borbo bordo boro- borod boroo borou borro boudh boudu bourd brobo brodd brodo brood broud brrrr brud- buddh buddu budur buoho buord buroo burro burru burud d-rod ddddd dhobb dhubb dhuhr do-do dobro dodoo dodro doodo dorud douro drbob drobo drood drouh dubbo duddo dudou duruh hhhhh hhour ho-ho ho-oh hobor hobro hobub hoddu hodhr hodod hodur hoord horod horro horru hourd hubur hudud hudur huhuh huuru o-r-b obhor obodo oboro obudu oddur odour odudu oduro oh-oh ohour ohrob ooooh ooooo ordro orobo orodo oruro ouoro rhod- rhodo ro-ro robbo robo- robor robur rodbo rodor rohob rohod rohru roodu rorbu rubor ruhub u-dub ubobo uh-oh uh-uh uhdoh uhhoh uhhuh uhuru uroob urour urubu uuuuu