cccc cccf cccs ccfc ccff ccoc ccrc ccrf ccrs ccsf ccss cfcf cfco cfcs cfcy cffr cfor cfos cfry cfyk ckck ckco ckcs ckcy ckfr ckoc ckoo ckor ckos ckoy ckrc ckry ckso cock coco cofc coff cofs cok- coko coky coof cook coos cor- corc corf cork coro corr cors cory cosc coso coss cosy coyf coyo coyr coys crcc crcr crfc crfs crkc croc crok croo cror croy crss cry- cryo crys cscc cscf csco cscr cscs csfc csfr csks csor csos csrc csrs cssr csys cyc- cycc cycs cyfs cyrk cyrs cyy- cyyc f--k fccf fcsc ffcc ffff ffrr ffss fock foco focs fofo foof fook foos for- fork foro forr fors foso foss foys frcc frfc fros frsc frso frys fscc fsck fsfo fssc fssf fyrk fyrs fyry k-os kccc kcck kccr kccy kcfc kcfo kcfy kckc kckf kckk kcko kckr kcky kcof kcor kcos kcrc kcro kcrr kcrs kcry kcsc kcsf kcsr kcss kcsy kcyk kcys kcyy kfcf kfco kfcr kfcs kfcy kfff kffk kfok kfoo kfor kfoy kfrc kfro kfrr kfrs kfry kfsk kfsr kfyo kfyr kkck kkco kkcr kkcs kkcy kkfr kkfs kkkk kkoo kkor kkoy kkrc kkrf kkrk kkro kkrr kkrs kksf kksr kkss kkyc kkys kkyy kocf kock kocs kofc koff kofk kofo kofy kokc kokf kokk koko kokr koks koky kooc kook kooo koor koos korc korf kork koro korr kors kos- kosc kosf koso kosr koss kosy koyf koyo koyy krcc krco krcs krfc krff krfo krfs krkc krkk krko krkr krks krky kroc krof krok kroo kror kros kroy krrc krrf krrk krro krrr krrs krry krsc krsf krsk krsr krss krsy kryk kryo kryy ksck ksco kscr kscs kscy ksfc ksfo ksfr kskf kskk ksko kskr ksks ksky ksoc ksof ksok ksoo ksor ksos ksrf ksro ksrr ksrs ksry ksso kssr ksss ksyc ksyf ksyr ksyy kycc kyck kycr kycs kyfr kyfs kykc kykk kykr kyks kyky kyok kyoo kyor kyos kyoy kyrc kyrf kyrk kyro kyrs kysc kysf kysk kysr kyyk kyyo kyys kyyy occc ocks ocos ocro ocrr ocrs ocys ofcr off- offc offo offr offs offy ofor okko okok okor okro okso okyo oocr ooff oofs oofy ooky oooo ooos oory orco orcs orff orfs orko oro- orof orok oror oros oroy orro orrs orry orsk orso orsy orys oscc osco osoo osor osos osro osso ossy oyss rccc rccs rcfc rcos rcsc rcss rcyc rffc rkkf rkos rkss rocc rock roco rocs rofc roff rofo rokk roko rokr roks roky roof rook roor roos rorc rork roro rory rosc roso ross rosy roys rrfc rrrr rscc rscs rscy rsfc rsos ryck ryff rysy ryyf s-os sccc sccs sccy scfc sck- scok scoo scor scr- scrc scrs scry scsc scso scsr sfcc sfco sfcs sffc sfor sfos sfrc sfro sfss skfc skor skss sky- skyf skyr skys skyy sock soco socr socs socy sofo sokk soko soof sook soor soos sooy soro sorr sors sory soso soss soyo soys srcc srfc sros sscc sscs ssfc ssoc ssrc ssrs sssc sssf ssss syck syco sycr syff syfy syro syrs syry syso syss syyk yccc ykko yksc yock yoff yoko yoks yoky yoof yook york yoro yory yoso yoyo yrof ysco yyff yyyy