c-cor ccccc co-co cocc- cocco cocur codco codo codru cokk- coord coro- corod couco courd couru crock croco crodo crood crook croud crouk cruck crudo cruor cucuk cukor cuoco curro d-cru d-rod d-rok dc-uk ddddd ddruk do-do dodoo dodro dokdo dokuo doodo dooku dorud doruk douck douro drock drood drook drouk du-ku ducor duddo dudok dudou duduc duduk dukku duroc durok ko-ko kodok kodur kokko kokor kokou kokur koord kooru korck korku koror korro koruk koudo krock krodo kucuk kudou kudur kukko kukok kukur kurku kuruc kurud kuruk occur ockro oddur odour odudu oduro okkur okoc okoro okuku okuru ooooo ordoc ordro orduc oroco orodo oruku oruro ouoro r-co- ro-ro rocco rocko rocor rocou rodoc rodok rodor rokkk roodu rouko rudkk rudok ukcdr ukodo urduk urour urucu uuork uuuuu