-form d-rod ddddd ddrmm ddrum dhoom dhuhr dhumm do-do dodoo dodro dofor doodo dorff dorud dorum doufu doumu douro drmom droff drom- dromo drood droof droom drouh droum drumm duddo dudou dufur duomo duruh durum fodor fofum fomor foord ford- fordo form- forro forud foruh forum forur fourd fourh fourm fouro frodo fromm frood froom froud fu-fu fuddu fudoh furo- furor furud fuudo hhhhh hhour ho-ho ho-oh hoddu hodhr hodod hodur hofuf hohum homo- hoord horod horom horro horru houff hourd hudud hudur huhuh humof humor humur hurm hurum huuru mhorr mmhmm mmmmm mo-do modom modum modur moffo mohor mohur mooro mordu morfu mormo moror morou morro morum mrmom mroof mrorr muddu mummu murdo murdu murom muror murrh murro murru murud murum o-hum oddur odoom odour odudu oduom oduro offof ofour ofrum oh-oh ohfoo ohmmm ohour ohrum omoro oohdm ooooh ooooo ordro orfor orm-d ormod ormur orodo oromo orrum oruro ouoro rhod- rhodo ro-ro rodor rofor rohff rohod rohru romfo roodu roomu roumm ruffo rufo- rummo rummu rumor ruomu ufofu uh-oh uh-uh uhdoh uhhoh uhhuh uhuru umhum umour umudu urour uuuuu