d-rod d-rok ddddd ddruk dhuhr do-do dodoo dodro dofor dohuk dokdo dokhu dokuo doodo dooku dorff dorud doruk doufu douro droff drood droof drook drouh drouk du-ku duddo dudok dudou duduk dufur dukku durok duruh fodor foord ford- fordo forro forud foruh forur fourd fourh fouro frodo frood froud fruko fu-fu fuddu fudoh furo- furor furud fuudo hhhhh hhour ho-ho ho-oh hoddu hodhr hodod hodur hofuf hokku hoord horod horro horru houff hourd hudud hudur huhuh hukok huork hurko hurok huuru khodr khoku khood khoro khour khufu khurd khuru khuur ko-ko kodok kodur kofud kokko kokor kokou kokur koord kooru korff korku koror korro koruk koudo koufu krodh krodo kudou kudur kukko kukok kukur kurku kurud kuruk oddur odour odudu oduro offof ofour oh-oh oh-ok ohfoo ohour okkur okoho okoro okuku okuru ooooh ooooo ordro orfor orodo oruku oruro ouoro rhod- rhodo ro-ro rodok rodor rofor rohff rohod rohru rokkk roodu rookh rouko rudkk rudok ruffo rufo- ufofu uh-oh uh-uh uhdoh uhhoh uhhuh uhuru ukodo urduk urour uuork uuuuu