ko-ko kokko kokor kokou kokry kokur kokyu kooky kooru korku koror korro korry koruk koryo koury koyuk kryo- kryry krzyz kukko kukok kukur kuoyu kurku kuruk kuryk kuzyk kyoko kyozo okkur okoro okoyo okuku okuru ooooo oruku oruro oryou oryz- ouoro oyoko oyoor oyrur ozoro ro-ro rokkk rokky rooky rouko rouky royko rozoy rozyu ryoko ryozo ryuko ryuzo u-roy uoyro urour urroz uryu uryuu uuork uuuuu uzury y-o-u yo-yo yokoo yokou yorro youku youok yukky yukou yuory yurok yuruk zokor zorko zorro zouyu zu-zu zukor zzzzz