d-dot d-rod ddddd do-do dodoo dodro doodo doout dordt dorot dorud dotoo dotto doupt douro drood droop drop- dropo dropt drott droup drout dtour duddo dudou durtu oddup oddur odour odudu oduro ooooo oopod opodo opto- optot optto ordro orodo orout ortoo oruro orutu ototo otour otpor ottur ouoro outdo outro outto po-po podo- podor poopo poort popop poppo popup poro- porro porto portu porur potoo potop potor potro potto pottu prodd proor proot prop- propp propr propt prot- proto proud prout prtor ptprd ptpro ptprr ptprt ptpru pudor pudur puppo puro- putor putt- putto puttu putuo putup ro-ro rodor roodu roto- rotor rotot rotto routt rprop rptor ruutu t-pop t-top to-do todor toord topo- topor topot toppo topto topup tordu torpo torro torto tortu torud toto- totoo totop totup tourd touro tprot trood troop trop- tropo trott troup trout trudo trupt truro ttttt tudor tudou tudur tuotu tupou turot turro turtu turup turut tutor tutto tuuru u-pop up-do upput uptop urour urutu utro- utrop utror uttur uturu ututo uuuuu