hhhh hhhs hoho hoos hoot hosh hoss host hoth hoto hots hott hshs hsts hths htoh ohho ohhs ohoh ohos ohso ohss ohto ooho oohs oooh oooo ooos oost oots osho oshs osoo osos osso osts otho oths oto- otoh otoo otos otso otto otts s-os shhh shhs shoo shos shot shts sohh soho sohs soos soot sosh soso soss sost soth soto sots sshs ssot sssh ssss ssth ssts sths stoo stos stot stss thoo thos thot thss thts toho tooh toos toot tosh toso toss tost toth toto tots tott tshs tsos tsst tsts ttss tttt