ddddd dhond dhoon dhoop do-do dodon dodoo dohop dondo donho donon doodo dozhd dpond hhhhh ho-ho ho-oh hodod hondo honno hoond hopon hoppo hozon n-p-n nnooo no-do no-no no-op nodoz nohno nondo nonno nonoh nonop nozno oh-oh onond onoon onpop ooooh ooooo oopod opodo opoho oppon oznoz ozon- ozono p-n-p phon- phono po-on po-po podo- pondo ponzo poond poopo popon popop poppo pozzo zondo zono- zooph zoppo zzzzz