cccc cccf cccs ccfc ccff ccoc ccrc ccrf ccrs ccsf ccss cfcf cfco cfcs cffr cfor cfos coco cofc coff cofs coof coos cor- corc corf coro corr cors cosc coso coss crcc crcr crfc crfs croc croo cror crss cscc cscf csco cscr cscs csfc csfr csor csos csrc csrs cssr fccf fcsc ffcc ffff ffrr ffss foco focs fofo foof foos for- foro forr fors foso foss frcc frfc fros frsc frso fscc fsfo fssc fssf occc ocos ocro ocrr ocrs ofcr off- offc offo offr offs ofor oocr ooff oofs oooo ooos orco orcs orff orfs oro- orof oror oros orro orrs orso oscc osco osoo osor osos osro osso rccc rccs rcfc rcos rcsc rcss rffc rocc roco rocs rofc roff rofo roof roor roos rorc roro rosc roso ross rrfc rrrr rscc rscs rsfc rsos s-os sccc sccs scfc scoo scor scr- scrc scrs scsc scso scsr sfcc sfco sfcs sffc sfor sfos sfrc sfro sfss soco socr socs sofo soof soor soos soro sorr sors soso soss srcc srfc sros sscc sscs ssfc ssoc ssrc ssrs sssc sssf ssss