hhhhh hi-hi hihos hiisi hipo- hipop hipp- hippi hippo hipps hisis hisop hispo hissi hisss ho-ho ho-oh hohos hoiss hoops hoosh hopis hoppo hopps hoshi hosho hosoi hospi hosps ihops iiiii ioooi ioooo iphis ipsi- ipsos is-is ishii ishis isios isisi isshi oh-oh oh-so ohohs oishi ooioo ooooh ooooo oopsi ophi- ophio ophis opihi opio- opoho oppos opsis oshio ososo ospis ossi- ossip ossis ossos phiph phish phos- phoss piisi pipis pippi pippo pissi po-po pohio poohs poopo poops popis popoi popop popos poppi poppo posho posio posip s-iii shhhh shiho shipp ships shish shiso shooi shoop shoos shopi shops shosh shosi sipho sipoo sipos sippi sippo sipsi sisis sissi so-ho so-so sohio sohos soosi sophi sopho sophs soppo soshi soss- sossi sphos spiss sposh sposi sposo ssssh sssss