ceecee cheche chechu check- checko cheech cheeke cheekh cheppu chocho choke- chokke chooce chooch chooke chopok chopup chucho chuchu chukke chukku chuo cocco- cockee cockup cococo coocoo coohee cookee cookoo cookop cookup coopee coopup copeck cophee couche coucke coupee cuckoo echeck ecoche ecocho ecopop epoche epopee eucope euphue hecche heehee hehehe hehheh heopop hkcccc hocooh hohoho hokpok hoohoo hookup hoopee hoopoe hoopoo hop-up houche houeko hucche huecco huh-uh hukkok kecche keepup keochu keokee keokuk khocho kohoku kokkoh kokoku kokopo kokopu kokpek kookoo koopoo kopeck kopeek koukou kucheh kuchek kukoc kupech o-hook ocho ohheck ohohoh ohpooh okopek okpoko oohooh oooooo oukoop pecche peckho peepee pochep pocock pookoo poopoo pop-up popeck popopo poppop poupee poupko poupou pouppe pppppp pu-hoe puccho pukeko puukko uh-huh upkeep