cccc cccf cccp cccs ccfc ccff ccoc ccpp ccpr ccps ccrc ccrf ccrp ccrs ccsf ccsp ccss cfcf cfco cfcs cffr cfor cfos cfpo cfpr cfps cfrp ckck ckco ckcs ckfr ckoc ckoo ckor ckos ckpc ckpr ckrc ckso cock coco cocp cofc coff cofs cok- coko coof cook coop coos copo copp copr cops cor- corc corf cork coro corp corr cors cosc coso cosp coss cpcs cpff cpos cpps cprs cpsc cpsk cpso cpsr crcc crcr crfc crfs crkc crkp croc crok croo crop cror crpc crps crsp crss cscc cscf csco cscr cscs csfc csfr csks csor csos cspc csps csrc csrs cssr f--k fccf fccp fcps fcsc ffcc ffff ffps ffrr ffss fock foco focs fofo foof fook foos fopp fops for- fork foro forr fors foso foss fp-c fpcc fprf frcc frcp frfc frop fros frps frsc frso fscc fsck fsfo fspc fspf fssc fssf fssp k-os kccc kcck kccr kcfc kcfo kcfp kckc kckf kckk kcko kckr kcof kcor kcos kcpc kcpo kcpr kcps kcrc kcro kcrp kcrr kcrs kcsc kcsf kcsp kcsr kcss kfcf kfco kfcr kfcs kfff kffk kfok kfoo kfor kfpr kfrc kfro kfrp kfrr kfrs kfsk kfsp kfsr kkck kkco kkcr kkcs kkfr kkfs kkkk kkoo kkor kkpc kkpk kkps kkrc kkrf kkrk kkro kkrr kkrs kksf kksp kksr kkss kocf kock kocp kocs kofc koff kofk kofo kofp kokc kokf kokk koko kokp kokr koks kooc kook kooo koop koor koos kopf kopp kopr kops korc korf kork koro korr kors kos- kosc kosf koso kosp kosr koss kpcc kpcr kpcs kpfc kpfk kpfr kpkk kpkr kpoc kpof kpok kpoo kpop kppc kppk kppo kppp kppr kprc kprf kprk kpro kprp kprr kprs kpsc kpsf kpso kpsp krcc krco krcs krfc krff krfo krfp krfs krkc krkk krko krkr krks kroc krof krok kroo krop kror kros krpr krps krrc krrf krrk krro krrr krrs krsc krsf krsk krsr krss ksck ksco kscr kscs ksfc ksfo ksfr kskf kskk ksko kskr ksks ksoc ksof ksok ksoo ksop ksor ksos kspc kspk kspo kspr ksps ksrf ksro ksrp ksrr ksrs ksso kssr ksss occc ocfp ocks ocos ocpp ocro ocrr ocrs ofcr off- offc offo offr offs ofor okko okok okor okpo okro okso oocr ooff oofs oooo ooos oops opo- opor opos oppo opps orco orcs orff orfs orko oro- orof orok oror oros orpc orps orro orrs orsk orso oscc osco osoo osor osos osro osso pccc pccs pcfc pcks pcos pcpp pcps pcrc pcrf pcso pfcs pfff pffr pfkp pfps pkcs pock poco pocs poff poko poof pook poop poor poos pop- popc popo popp pops porc pork poro porr pors posk poso poss ppcc ppcs ppos pppo pppp ppps pprc pprf ppsf ppss prcc prcf prcp prcs prfc prfs pro- proc prof proo prop pros prps prrs prsc prso prss psco psfk psfs psoc psos pspp pspr psps psrk psrp pssc psso rccc rccs rcfc rcos rcpo rcps rcsc rcss rffc rkkf rkos rkss rocc rock roco rocs rofc roff rofo rokk roko rokr roks roof rook roop roor roos ropo rops rorc rork roro rosc roso rosp ross rpcs rpfc rpof rpos rpps rrfc rrrr rrsp rscc rscs rsfc rsos rspk rspo rsps s-os sccc sccp sccs scfc sck- scok scoo scop scor scpo scps scr- scrc scrs scsc scso scsr sfcc sfco sfcs sffc sfor sfos sfpc sfrc sfro sfss skfc skop skor skpc skpo skss sock soco socr socs sofo sokk soko soof sook soop soor soos sopo sopp sops soro sorr sors soso soss spcc spco spcs spfc spfs spkr spoc spok spoo spop spor spos sppf spps spro sprs spso spsp spss srcc srfc sros srpc srps srsp sscc sscp sscs ssfc ssfp ssoc ssop sspc sspf sspo ssps ssrc ssrs sssc sssf ssss