c-cor c-p-c c-pop ccccc ceco- ceere ceoce ceoor ceppo cerc- cerce cerco cerec cerer cerke cero- ceroc cerre cerro co-co co-op cocc- cocce cocco coceo cocke cockx coepe coker cokk- cooee cooer cooke coope coore copce copec coper coppe coppo copr- copre copro corce core- coree corer corex corke coro- corop corpe corre crece creek creep creer creke creo- creop crepe croce crock croco croke crooe crook croop cropc crope cropo crore e-pro ecker ecorp eecke eeeee eepee ekeko ekker eorre eperc erere erkec erkko erkoc eroor erore error excop execx exopc exore exper expro k-p-r k-pop k-x-p kecer keepe keere kekec kepco keppe kerek kerep kerre kexec ko-ko kocek kocer kocke koepp koker kokko kokor kokre kopce kopec kopek koper koppe korck korec korek korke korop koror korpe korpo korro kre-o kreek kreep kreke kreo- krepe krock kroke kropp ocker ockro ocoee ocree oeco- oeppo okeke okere okker okoc okoro oo-er oocre ooooo opepe opere opper orcop oreck oreco oreo- orere orero orexo oroco oroer oroke p-o-x p-rep pcock pecco pecke peece peeke peere pekoe pekre pepco pepee peppe perce perec perer perke perko perox perre perro pexec po-po pocko pocok pocop poker pooer pooke poope poopo poore poork popco popek poper popex popop poppe poppo porco porec porer porke poro- porro pppox pre-k prece preco preke preko preok preop prkce prock proer proke proor prop- prope propp propr prore r-co- recce recco recep recke reece reepe reere rekke reorx repco repec repok repop repor reppe repro rere- reree rexer ro-ro rocco rocke rocko rocor roero rokee roker rokke rokkk rooer rooke roope roore roper roppe rorer rorke rprop xero- xerox xexex xorro xoxox xpeke xproc