cccc cccp cccs ccoc ccpp ccpr ccps ccrc ccrp ccrs ccsp ccss ckck ckco ckcs ckoc ckoo ckor ckos ckpc ckpr ckrc ckso cock coco cocp cok- coko cook coop coos copo copp copr cops cor- corc cork coro corp corr cors cosc coso cosp coss cpcs cpos cpps cprs cpsc cpsk cpso cpsr crcc crcr crkc crkp croc crok croo crop cror crpc crps crsp crss cscc csco cscr cscs csks csor csos cspc csps csrc csrs cssr k-os kccc kcck kccr kckc kckk kcko kckr kcor kcos kcpc kcpo kcpr kcps kcrc kcro kcrp kcrr kcrs kcsc kcsp kcsr kcss kkck kkco kkcr kkcs kkkk kkoo kkor kkpc kkpk kkps kkrc kkrk kkro kkrr kkrs kksp kksr kkss kock kocp kocs kokc kokk koko kokp kokr koks kooc kook kooo koop koor koos kopp kopr kops korc kork koro korr kors kos- kosc koso kosp kosr koss kpcc kpcr kpcs kpkk kpkr kpoc kpok kpoo kpop kppc kppk kppo kppp kppr kprc kprk kpro kprp kprr kprs kpsc kpso kpsp krcc krco krcs krkc krkk krko krkr krks kroc krok kroo krop kror kros krpr krps krrc krrk krro krrr krrs krsc krsk krsr krss ksck ksco kscr kscs kskk ksko kskr ksks ksoc ksok ksoo ksop ksor ksos kspc kspk kspo kspr ksps ksro ksrp ksrr ksrs ksso kssr ksss occc ocks ocos ocpp ocro ocrr ocrs okko okok okor okpo okro okso oocr oooo ooos oops opo- opor opos oppo opps orco orcs orko oro- orok oror oros orpc orps orro orrs orsk orso oscc osco osoo osor osos osro osso pccc pccs pcks pcos pcpp pcps pcrc pcso pkcs pock poco pocs poko pook poop poor poos pop- popc popo popp pops porc pork poro porr pors posk poso poss ppcc ppcs ppos pppo pppp ppps pprc ppss prcc prcp prcs pro- proc proo prop pros prps prrs prsc prso prss psco psoc psos pspp pspr psps psrk psrp pssc psso rccc rccs rcos rcpo rcps rcsc rcss rkos rkss rocc rock roco rocs rokk roko rokr roks rook roop roor roos ropo rops rorc rork roro rosc roso rosp ross rpcs rpos rpps rrrr rrsp rscc rscs rsos rspk rspo rsps s-os sccc sccp sccs sck- scok scoo scop scor scpo scps scr- scrc scrs scsc scso scsr skop skor skpc skpo skss sock soco socr socs sokk soko sook soop soor soos sopo sopp sops soro sorr sors soso soss spcc spco spcs spkr spoc spok spoo spop spor spos spps spro sprs spso spsp spss srcc sros srpc srps srsp sscc sscp sscs ssoc ssop sspc sspo ssps ssrc ssrs sssc ssss