cccc cccs ccoc ccrc ccrs ccrt ccss ccst cctc cctt ckck ckco ckcs ckoc ckoo ckor ckos ckot ckrc ckso ckst ckts cock coco coct cok- coko cook coos coot cor- corc cork coro corr cors cort cosc coso coss cost cotc coto cots cott crcc crcr crkc croc crok croo cror crot crrt crss crst crtc crts cscc csco cscr cscs csks csor csos csot csrc csrs cssr cstc csto cstr csts ctor ctos ctot ctrc ctrs ctsc ctss ctts k-os kccc kcck kccr kcct kckc kckk kcko kckr kcor kcos kcot kcrc kcro kcrr kcrs kcrt kcsc kcsr kcss kcst kctc kcto kkck kkco kkcr kkcs kkct kkkk kkoo kkor kkot kkrc kkrk kkro kkrr kkrs kkrt kksr kkss kkst kktc kktk kkts kock kocs koct kokc kokk koko kokr koks kooc kook kooo koor koos koot korc kork koro korr kors kort kos- kosc koso kosr koss kost kotc kotk koto kotr kots kott krcc krco krcs krkc krkk krko krkr krks kroc krok kroo kror kros krrc krrk krro krrr krrs krrt krsc krsk krsr krss krst krtc krtk krto krtr krts ksck ksco kscr kscs kskk ksko kskr ksks ksoc ksok ksoo ksor ksos ksro ksrr ksrs ksrt ksso kssr ksss ksst kstc kstk ksto kstr ksts kstt ktcc ktck ktco ktcr ktcs ktkc ktkk ktko ktkr ktks ktkt ktoc ktok ktoo ktor ktot ktrc ktrk ktro ktrr ktrs ktrt ktsc ktso ktsr ktst kttc kttk ktto kttr ktts kttt occc occt ocks ocos ocro ocrr ocrs oct- octo octs okko okok okor okot okro okso okto oocr oooo ooos oort oost oots orco orcs orko oro- orok oror oros orot orro orrs orsk orso ortc orto orts oscc osco osoo osor osos osro osso ostc ostr osts oto- otok otoo otor otos otro otrs otso otto otts rccc rccs rcos rcsc rcss rctc rcts rkos rkss rkts rocc rock roco rocs rokk roko rokr roks rook roor roos root rorc rork roro rort rosc roso ross rost rotc rotk roto rotr rots rott rrrr rscc rscs rsos rsts rtcc rtss rtts s-os sccc sccs scct sck- scok scoo scor scot scr- scrc scrs scsc scso scsr scst sctc scto sctr scts skor skot skrt skss sock soco socr socs sokk soko sook soor soos soot soro sorr sors sort soso soss sost sotc sotk soto sots srcc srct sros srtr sscc sscs ssoc ssot ssrc ssrs sssc ssss sstc ssts stcc stcs stks stok stoo stor stos stot strc strk stro strs stss sttc sttr tccc tcos tctc tcts tkos tkts tock toco toko took toor toos toot torc tork toro torr tors tort tosc tosk toso toss tost totc toto totr tots tott trcc troc troo tros trot trst trtc trtr tscc tsks tsos tssr tsst tstc tsts ttss tttt