cccc cccs cchs ccoc ccss ccst cctc cctt chch chcs chhs chks chkt choc choh chok choo chos chsc chsh chst chto chtt ckch ckck ckco ckcs ckhs ckoc ckoo ckos ckot cksh ckso ckst ckts coch cock coco coct coho cohs cok- coko cooh cook coos coot cosc cosh coso coss cost cotc coth coto cots cott cscc csch csco cscs cshs csks csos csot cstc csto csts cths ctos ctot ctsc ctss ctts hccc hcch hccs hchs hcsc hcso hcss hcst hhhh hhhs hkcc hkcs hkst hoch hock hocs hoho hoko hoks hook hoos hoot hosh hoss host hoth hoto hots hott hscc hsct hshs hsts htcc hths htoh htsc k-os kccc kcck kcct kchh kchk kcho kchs kckc kckk kcko kcoh kcos kcot kcsc kcss kcst kctc kcto khcc khch khck khcs khct khhk khho khhs khkk khks khoc khok khot khss khst khth khtk khto khts khtt kkch kkck kkco kkcs kkct kkhh kkhk kkkk kkoh kkoo kkot kkss kkst kktc kktk kkts koch kock kocs koct kohh koho kohs koht kokc kokh kokk koko koks kooc kook kooo koos koot kos- kosc kosh koso koss kost kotc koth kotk koto kots kott ksch ksck ksco kscs kshk ksho kshs kskk ksko ksks ksoc ksok ksoo ksos ksso ksss ksst kstc ksth kstk ksto ksts kstt ktcc ktch ktck ktco ktcs kthc kthh kthk ktho kths ktht ktkc ktkk ktko ktks ktkt ktoc ktoh ktok ktoo ktot ktsc ktso ktst kttc ktth kttk ktto ktts kttt occc occt ochs ocht ocks ocos oct- octo octs ohcc ohho ohhs ohoh ohok ohos ohso ohss ohto okko okok okot okso okto ooho oohs oooh oooo ooos oost oots oscc osco oshc osho oshs osoo osos osso ostc osts otho oths oto- otoh otok otoo otos otso otto otts s-os sccc sccs scct sch- schh scho schs sck- scoh scok scoo scot scsc scsh scso scst sctc scto scts shcc shhh shhs shok shoo shos shot shsc shts skhs skot skss soch sock soco socs sohh soho sohs sokk soko sook soos soot sosh soso soss sost sotc soth sotk soto sots sscc sscs sshs ssoc ssot sssc sssh ssss sstc ssth ssts stcc stch stcs sths stks stok stoo stos stot stss sttc tccc tch- tchh tcho tchs tcos tcsh tctc tcts thch thoo thos thot thss thts tkos tkts toch tock toco toho toko tooh took toos toot tosc tosh tosk toso toss tost totc toth toto tots tott tscc tshs tsks tsos tsst tstc tsts ttss tttt