d-rod ddddd ddrmm ddrum dholl dhool dhoom dhrol dhuhr dhumm do-do do-ol dodol dodoo dodro dohol dohul dollo dollu dolor doodo dorud dorum doull doumu douro drmom droll drom- dromo drood drool droom drouh droul droum drumm duddo dudou dullu dumlu dumol duomo duruh durum hhhhh hhour hlddr ho-ho ho-oh hoddu hodhr hodod hodur hohol hohum hollo holo- holor holou holul holum homo- hoold hoord horod horol horom horro horru hould hourd hudud hudul hudur huhuh hullo humor humur huolu hurll hurm hurum huuru loddo lodro lohho lohur lollo lolol loord lorom lorum lourd louro luddu lulom lulul mhorr mlord mmhmm mmmmm mo-do modom modum modur mohol mohor mohur mold- mollo mollu molor momlu moold mooll moolu mooro mordu mormo moror morou morro morum mould moulu mrmom mrorr muddu mullo mulur mumlu mummu murdo murdu murlo murol murom muror murrh murro murru murud murum o-hum oddur odlum odolo odoom odoul odour odudu oduom oduro oh-oh ohmmm ohour ohrum ollur olmod olomu olord olour olumu omoro omulu oohdm ooooh ooooo ordro orm-d ormod ormur orodo orold orolu oromo orrum oruro oullo ouoro ourol rdllr rhod- rhodo rlmdl ro-ro rodl rodor rohod rohru rollo rolmo roodu roomu roull roumm rullo rummo rummu rumor ruomu udol udoll uh-oh uh-uh uhdoh uhhoh uhhuh uhuru ullur ulrum ululu uluru umhum umour umudu urour uuuuu