hhhhh hi-hi himom hipo- hipop hipp- hippi hippo ho-ho ho-oh hohim hohum homo- hoppo hopup hou-i huhuh humph iiiii imhip iommi ioooi ioooo mi-mi mihop mimio mimmi mimo- mimpi mipim mmhmm mmiii mmmmm mmpip momoi moooi moppi mopup mummu muppu o-hum oh-oh ohiou ohmmm omupo ooioo oomph ooooh ooooo ophi- ophio opihi opio- opium opoho oppum opump ouihi phimu phiph pippi pippo po-po pohio poipu pomi- pompu pomum poopo popoi popop poppi poppo popup puhmu puhoi puppo u-pop uh-oh uh-uh uhhoh uhhuh umhum uuuuu