d-rod ddddd dholl dhool dhrol dhuhr do-do do-ol dodol dodoo dodro dofor dohol dohul dollo dollu dolor doodo dorff dorud doufu doull douro droff droll drood droof drool drouh droul duddo dudou dufur dullu duruh ffold flodd flohr flood floor floro floru floud flouh flour fludd fluff fluo- fluor flurr fodor follo foord ford- fordo forro forud foruh forur fould fourd fourh fouro frodo frood froud fu-fu fuddu fudoh fullf fullo furo- furor furud fuudo hhhhh hhour hlddr ho-ho ho-oh hoddu hodhr hodod hodur hofuf hoful hohol hollo holo- holor holou holul hoold hoord horod horol horro horru houff hould hourd hrolf hudud hudul hudur huhuh hullo huolu hurll huuru loddo lodro lofou lohho lohur lollo lolol loord lourd louro luddu lulul oddur odolo odoul odour odudu odulf oduro offof ofold ofour oh-oh ohfoo ohour ollur olord olour ooooh ooooo ordro orfor orful orodo orold orolu oruro oullo ouoro ourol rdllr rhod- rhodo ro-ro rodl rodor rofor rohff rohod rohru rolfo rollo roodu roull ruffo rufo- rufol rullo udol udoll ufofu uh-oh uh-uh uhdoh uhhoh uhhuh uhuru ullur ululu uluru urour uuuuu