hhhhh ho-ho ho-oh hohum homo- honno hopon hoppo hopup huhuh humph mmhmm mmmmm mohon mohun monno mono- monon mopup mummu mumun muppu n-p-n nnooo no-no no-op nohno nohom nohup nommo nomo- nomom non-u nonno nonoh nonop noonu nopun nu-nu nuhuh nunon nunun o-hum oh-oh ohmmm omoon omupo onmun onoon onpop oomph ooooh ooooo opoho oppon oppum opump p-n-p phnom phon- phono po-on po-po pompu pomum ponnu ponup poopo popon popop poppo popup puhmu punon puppo u-pop uh-oh uh-uh uhhoh uhhuh umhum unnun uppon uuuuu