c-cor ccccc co-co cocc- cocco cocur cokk- coorg coro- couco couru crock croco crook crouk cruck cruor cucuk cukor cuoco curro curug go-go go-oo gocco gocoo gocuk gogok gogro gorgo grgur grock grogg grokk grook grrrr gukgo gurko guroo gurro gurur ko-ko kogro kokko kokor kokou kokur koogu kooru korck korgu korku koror korro koruk krock kucuk kugur kukko kukok kukur kurgo kurku kuruc kuruk occur ockro ogogo ogugu okkur okoc okoro okrog okrug okuku okuru ooooo oroco orrgo oruku oruro ouoro r-co- ro-ro rocco rocko rocor rocou rokkk rouko ugro- ugrug ukuug urour urucu uuork uuuuu