eeeee ekeko ekker ekuku ekuru eorre erere erkko eroor erore error eruke euro- eurre keere kerek kerre ko-ko koker kokko kokor kokou kokre kokur kooru korek korke korku koror korro korue koruk kouer koure kre-o kreek kreke kreo- kreuk kroke kukko kukok kukur kurek kurku kurre kuruk okeke okere okker okkur okoro okuku okuru oo-er ooooo oreo- orere orero oroer oroke oruku oruro ouoro oure- reere rekke rere- reree reuer ro-ro roero rokee roker rokke rokkk rooer rooke roore rooue rorer rorke rouer rouke rouko roure ruere rukke ukeke uouee ureo- urker urour uuork uuuuu