cccc cccp cccs ccoc ccpp ccpr ccps ccrc ccrp ccrs ccsp ccss coco cocp coop coos copo copp copr cops cor- corc coro corp corr cors cosc coso cosp coss cpcs cpos cpps cprs cpsc cpso cpsr crcc crcr croc croo crop cror crpc crps crsp crss cscc csco cscr cscs csor csos cspc csps csrc csrs cssr occc ocos ocpp ocro ocrr ocrs oocr oooo ooos oops opo- opor opos oppo opps orco orcs oro- oror oros orpc orps orro orrs orso oscc osco osoo osor osos osro osso pccc pccs pcos pcpp pcps pcrc pcso poco pocs poop poor poos pop- popc popo popp pops porc poro porr pors 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 psrp pssc psso rccc rccs rcos rcpo rcps rcsc rcss rocc roco rocs roop roor roos ropo rops rorc roro rosc roso rosp ross rpcs rpos rpps rrrr rrsp rscc rscs rsos rspo rsps s-os sccc sccp sccs scoo scop scor scpo scps scr- scrc scrs scsc scso scsr soco socr socs soop soor soos sopo sopp sops soro sorr sors soso soss spcc spco spcs spoc 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