cccc cccs cchs ccoc ccss ccst cctc cctt chch chcs chhs choc choh choo chos chsc chsh chst chto chtt coch coco coct coho cohs cooh coos coot cosc cosh coso coss cost cotc coth coto cots cott cscc csch csco cscs cshs csos csot cstc csto csts cths ctos ctot ctsc ctss ctts hccc hcch hccs hchs hcsc hcso hcss hcst hhhh hhhs hoch hocs hoho hoos hoot hosh hoss host hoth hoto hots hott hscc hsct hshs hsts htcc hths htoh htsc occc occt ochs ocht ocos oct- octo octs ohcc ohho ohhs ohoh ohos ohso ohss ohto ooho oohs oooh oooo ooos oost oots oscc osco oshc osho oshs osoo osos osso ostc osts otho oths oto- otoh otoo otos otso otto otts s-os sccc sccs scct sch- schh scho schs scoh scoo scot scsc scsh scso scst sctc scto scts shcc shhh shhs shoo shos shot shsc shts soch soco socs sohh soho sohs soos soot sosh soso soss sost sotc soth soto sots sscc sscs sshs ssoc ssot sssc sssh ssss sstc ssth ssts stcc stch stcs sths stoo stos stot stss sttc tccc tch- tchh tcho tchs tcos tcsh tctc tcts thch thoo thos thot thss thts toch toco toho tooh toos toot tosc tosh toso toss tost totc toth toto tots tott tscc tshs tsos tsst tstc tsts ttss tttt