hhhhh hhour hi-hi hipo- hipop hipp- hippi hippo hiroi hiroo hirur ho-ho ho-oh hoori hoppo hopup horii horio horro horru horup hou-i houir houri huhuh hurri hurup huuru iiiii ioooi ioooo iorio ipour irori irour irupi oh-oh ohiou ohour ohrio ooioo ooooh ooooo ophi- ophio ophir ophur opihi opio- opir opoho oropi oruro ouihi ouir- ouoro phhir phiph phiri phrop piiri pippi pippo pipri pirho pirou pirri pirro pirui piuri piuro piuru po-po pohio poipu poopo poori popoi popop poppi poppo popup poro- poroi porri porro porur prior proor prop- propp propr puhoi puppo pupri purio puro- puuri ripio ripup rirpu ro-ro rohri rohru roohi rprop ruiru u-pop uh-oh uh-uh uhhoh uhhuh uhuru uiro uropi urour urphi ururi uuuuu