d-rod ddddd do-do do-ol dodol dodon dodoo dodro dollo dollu dolno dolon dolor dondo donon donor doodo doorn dorno doron dorud doull douro droll drood drool droon droul droun duddo dudon dudou dullu dundo dunno dunod dunun durno duron l-ron loddo lodno lodro lollo lolol londo loord loron lorun lound lourd louro luddu lulul lundu lurun ndour ndulu nduru nnooo no-do no-no noldo non-u nondo nonno noonu noord nordo noron norro norun nould nu-nu nudol nudur nullo nunon nunun nuoro nurlu nurun oddur odolo odoul odour odudu oduro ollon ollur olord olour ondol onond onoon onorn onour ooooo ordon ordro orlon ornon orodo orold orolu orono oruro oudon oullo oulon oulun ouoro ourno ourol rdllr ro-ro rodl rodon rodor rollo rolon rondo ronno roodu roond roull round rudno rullo rulon rundu runo- runon udol udoll ullur ulno- ululu uluru undun undur unnun unnur unold unoor unorn unrol unrun unurn urour uuuuu