cccc cccs ccoc ccss ccst cctc cctt ckck ckco ckcs ckoc ckoo ckos ckot ckso ckst ckts cock coco coct cok- coko cook coos coot cosc coso coss cost cotc coto cots cott cscc csco cscs csks csos csot cstc csto csts ctos ctot ctsc ctss ctts k-os kccc kcck kcct kckc kckk kcko kcos kcot kcsc kcss kcst kctc kcto kkck kkco kkcs kkct kkkk kkoo kkot kkss kkst kktc kktk kkts kock kocs koct kokc kokk koko koks kooc kook kooo koos koot kos- kosc koso koss kost kotc kotk koto kots kott ksck ksco kscs kskk ksko ksks ksoc ksok ksoo ksos ksso ksss ksst kstc kstk ksto ksts kstt ktcc ktck ktco ktcs ktkc ktkk ktko ktks ktkt ktoc ktok ktoo ktot ktsc ktso ktst kttc kttk ktto ktts kttt occc occt ocks ocos oct- octo octs okko okok okot okso okto oooo ooos oost oots oscc osco osoo osos osso ostc osts oto- otok otoo otos otso otto otts s-os sccc sccs scct sck- scok scoo scot scsc scso scst sctc scto scts skot skss sock soco socs sokk soko sook soos soot soso soss sost sotc sotk soto sots sscc sscs ssoc ssot sssc ssss sstc ssts stcc stcs stks stok stoo stos stot stss sttc tccc tcos tctc tcts tkos tkts tock toco toko took toos toot tosc tosk toso toss tost totc toto tots tott tscc tsks tsos tsst tstc tsts ttss tttt