cocco- cockup cococo cocolo cocool collo- collop collup coloop colpo- coocoo cookoo cookop cookup coopup copull coupul cuckoo cupolo cuppul cupulo klocko klokoc klucko kokoku kokolo kokopo kokopu kolluk kololo kolpo- kookoo koopoo koukou koulou kukoc kulolo kululu kupolo lockup locock lollop lookup looloo loopco loplop loukou loulou lukulu oclock oculo- okollo okpoko olluco oluklu oooooo oukoop plocko pocock polloc pollok polpol pookoo poopoo pop-up popopo poppop populo poupko poupou pppppp pucol pullup puukko ullock ulluco ullucu uplook