c-cor ccccc ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerer cerke cero- ceroc cerre cerro co-co cocc- cocce cocco coceo cocke cockx coker cokk- cooee cooer cooke coore corce core- coree corer corex corke coro- corre crece creek creer creke creo- croce crock croco croke crooe crook crore ecker eecke eeeee ekeko ekker eorre erere erkec erkko erkoc eroor erore error execx exore kecer keere kekec kerek kerre kexec ko-ko kocek kocer kocke koker kokko kokor kokre korck korec korek korke koror korro kre-o kreek kreke kreo- krock kroke ocker ockro ocoee ocree oeco- okeke okere okker okoc okoro oo-er oocre ooooo oreck oreco oreo- orere orero orexo oroco oroer oroke r-co- recce recco recke reece reere rekke reorx rere- reree rexer ro-ro rocco rocke rocko rocor roero rokee roker rokke rokkk rooer rooke roore rorer rorke xero- xerox xexex xorro xoxox