d-dot d-rod d-rok ddddd ddruk do-do dodoo dodro dokdo dokuo doodo dooku doout dordt dorot dorud doruk dotoo dotto doupt douro drood drook droop drop- dropo dropt drott drouk droup drout dtour du-ku duddo dudok dudou duduk dukku dukot durok durtu k-p-r k-pop ko-ko kodok kodur kokko kokor kokot kokou kokur kokut koord kooru kopru korku korop koror korpo korro kortu koruk korup kotor kotto kottu kotur koudo kouto krodo kroot kropp krout krtok krupp kruto kudou kudur kukko kukok kukup kukur kupto kupur kurku kurud kuruk kurup kuttu kutur oddup oddur odour odudu oduro okkur okoro okrut okuku okuru ooooo oopod opodo opoku opto- optot optto ordro orkut orodo orout ortok ortoo oruku oruro orutu otoku ototo otour otpor otrok ottur oukup ouoro outdo outro outto po-po podo- podor pokot pokou poopo poork poort popop poppo popup poro- porro porto portu porur potku potok potoo potop potor potrk potro potto pottu prodd proor proot prop- propp propr propt prot- proto proud prout prtor ptprd ptprk ptpro ptprr ptprt ptpru pudor pudur puppo purku puro- purok putor putt- putto puttu putuo putup ro-ro rodok rodor rokkk rokot rokto roodu rotko roto- rotor rotot rotto rouko routt rprop rptor rt-rk rudkk rudok ruutu t-pop t-top to-do todok todor tokdo tokko toko- tokod tokor tokuo tokur toord topo- topor topot toppo topto topup tordu torok torpo torro torto tortu torud toto- totok totoo totop totup tourd touro tprot trood troop trop- tropo trott troup trout trudo trupt truro ttttt tudor tudou tudur tukur tuotu tupou turko turku turok turot turro turtu turup turut tutku tutor tutto tuuru u-pop ukodo ukpor ukrop up-do upput uptop urduk urkut urour urutu utro- utrop utror uttur uturu ututo uuork uuuuu