cccc cccf cccs ccfc ccff ccoc ccrc ccrf ccrs ccrt ccsf ccss ccst cctc cctt cfcf cfco cfcs cffr cfor cfos cfrt cftc cftk cftr ckck ckco ckcs ckfr ckoc ckoo ckor ckos ckot ckrc ckso ckst ckts cock coco coct cofc coff cofs coft cok- coko coof cook coos coot cor- corc corf cork coro corr cors cort cosc coso coss cost cotc coto cots cott crcc crcr crfc crfs crkc croc crok croo cror crot crrt crss crst crtc crtf crts cscc cscf csco cscr cscs csfc csfr csks csor csos csot csrc csrs cssr cstc csto cstr csts ctcf ctfc ctfo ctfs ctor ctos ctot ctrc ctrs ctsc ctss ctts f--k fccf fcot fcsc fcst fcto ffcc ffff ffrr ffss fftf fock foco focs fofo foof fook foos foot for- fork foro forr fors fort foso foss fost foto fots fott frcc frfc fros frot frsc frso frst fscc fsck fsfo fssc fssf ft-c ftfc ftos ftrs ftsr k-os kccc kcck kccr kcct kcfc kcfo kcft kckc kckf kckk kcko kckr kcof kcor kcos kcot kcrc kcro kcrr kcrs kcrt kcsc kcsf kcsr kcss kcst kctc kcto kfcf kfco kfcr kfcs kfff kffk kfok kfoo kfor kfrc kfro kfrr kfrs kfsk kfsr kfst kftc kftk kftt kkck kkco kkcr kkcs kkct kkfr kkfs kkft kkkk kkoo kkor kkot kkrc kkrf kkrk kkro kkrr kkrs kkrt kksf kksr kkss kkst kktc kktk kkts kocf kock kocs koct kofc koff kofk kofo koft kokc kokf kokk koko kokr koks kooc kook kooo koor koos koot korc korf kork koro korr kors kort kos- kosc kosf koso kosr koss kost kotc kotk koto kotr kots kott krcc krco krcs krfc krff krfo krfs krft krkc krkk krko krkr krks kroc krof krok kroo kror kros krrc krrf krrk krro krrr krrs krrt krsc krsf krsk krsr krss krst krtc krtk krto krtr krts ksck ksco kscr kscs ksfc ksfo ksfr ksft kskf kskk ksko kskr ksks ksoc ksof ksok ksoo ksor ksos ksrf ksro ksrr ksrs ksrt ksso kssr ksss ksst kstc kstk ksto kstr ksts kstt ktcc ktck ktco ktcr ktcs ktfc ktfo ktfs ktkc ktkk ktko ktkr ktks ktkt ktoc ktok ktoo ktor ktot ktrc ktrf ktrk ktro ktrr ktrs ktrt ktsc ktsf ktso ktsr ktst kttc kttf kttk ktto kttr ktts kttt occc occt ocks ocos ocro ocrr ocrs oct- octo octs ofcr off- offc offo offr offs ofor ofst okko okok okor okot okro okso okto oocr ooff oofs oooo ooos oort oost oots orco orcs orff orfs orko oro- orof orok oror oros orot orro orrs orsk orso ortc orto orts oscc osco osoo osor osos osro osso ostc ostr osts otfc oto- otof otok otoo otor otos otro otrs otso otto otts rccc rccs rcfc rcos rcsc rcss rctc rcts rffc rftc rkkf rkos rkss rkts rocc rock roco rocs rofc roff rofo rokk roko rokr roks roof rook roor roos root rorc rork roro rort rosc roso ross rost rotc rotk roto rotr rots rott rrfc rrrr rscc rscs rsfc rsos rsts rtcc rtfc rtss rtts s-os sccc sccs scct scfc sck- scok scoo scor scot scr- scrc scrs scsc scso scsr scst sctc scto sctr scts sfcc sfco sfcs sffc sfor sfos sfrc sfro sfss sfts skfc skor skot skrt skss sock soco socr socs sofo soft sokk soko soof sook soor soos soot soro sorr sors sort soso soss sost sotc sotk soto sots srcc srct srfc sros srtr sscc sscs ssfc ssoc ssot ssrc ssrs sssc sssf ssss sstc ssts stcc stcs stfc stks stof stok stoo stor stos stot strc strk stro strs stsf stss sttc sttr tccc tcfc tcos tctc tcts tfot tfrs tfss tftc tkof tkos tkts tock toco toff tofo toft toko toof took toor toos toot torc torf tork toro torr tors tort tosc tosk toso toss tost totc toto totr tots tott trcc trfc trfr troc troo tros trot trst trtc trtr tscc tsfc tsks tsos tssf tssr tsst tstc tsts ttfc ttff ttss tttt