cccc cccf cccs ccfc ccff ccoc ccsf ccss ccst cctc cctt cfcf cfco cfcs cfos cftc cftk ckck ckco ckcs ckoc ckoo ckos ckot ckso ckst ckts cock coco coct cofc coff cofs coft cok- coko coof cook coos coot cosc coso coss cost cotc coto cots cott cscc cscf csco cscs csfc csks csos csot cstc csto csts ctcf ctfc ctfo ctfs ctos ctot ctsc ctss ctts f--k fccf fcot fcsc fcst fcto ffcc ffff ffss fftf fock foco focs fofo foof fook foos foot foso foss fost foto fots fott fscc fsck fsfo fssc fssf ft-c ftfc ftos k-os kccc kcck kcct kcfc kcfo kcft kckc kckf kckk kcko kcof kcos kcot kcsc kcsf kcss kcst kctc kcto kfcf kfco kfcs kfff kffk kfok kfoo kfsk kfst kftc kftk kftt kkck kkco kkcs kkct kkfs kkft kkkk kkoo kkot kksf kkss kkst kktc kktk kkts kocf kock kocs koct kofc koff kofk kofo koft kokc kokf kokk koko koks kooc kook kooo koos koot kos- kosc kosf koso koss kost kotc kotk koto kots kott ksck ksco kscs ksfc ksfo ksft kskf kskk ksko ksks ksoc ksof ksok ksoo ksos ksso ksss ksst kstc kstk ksto ksts kstt ktcc ktck ktco ktcs ktfc ktfo ktfs ktkc ktkk ktko ktks ktkt ktoc ktok ktoo ktot ktsc ktsf ktso ktst kttc kttf kttk ktto ktts kttt occc occt ocks ocos oct- octo octs off- offc offo offs ofst okko okok okot okso okto ooff oofs oooo ooos oost oots oscc osco osoo osos osso ostc osts otfc oto- otof otok otoo otos otso otto otts s-os sccc sccs scct scfc sck- scok scoo scot scsc scso scst sctc scto scts sfcc sfco sfcs sffc sfos sfss sfts skfc skot skss sock soco socs sofo soft sokk soko soof sook soos soot soso soss sost sotc sotk soto sots sscc sscs ssfc ssoc ssot sssc sssf ssss sstc ssts stcc stcs stfc stks stof stok stoo stos stot stsf stss sttc tccc tcfc tcos tctc tcts tfot tfss tftc tkof tkos tkts tock toco toff tofo toft toko toof took toos toot tosc tosk toso toss tost totc toto tots tott tscc tsfc tsks tsos tssf tsst tstc tsts ttfc ttff ttss tttt