c-cd cccc cccf cccs ccdc ccdf ccdr ccds ccfc ccfd ccff ccoc ccod ccrc ccrf ccrs ccsd ccsf ccss cd-r cdcs cddr cdfs cdos cdrs cdss cfcf cfco cfcs cfds cffr cfor cfos coco codd cods cofc coff cofs cood coof coos cor- corc cord corf coro corr cors cosc coso coss crcc crcr crdc crfc crfs croc crod croo cror crss cscc cscd cscf csco cscr cscs csdr csfc csfr csor csos csrc csrd csrs cssd cssr dccc dccs dcds dcfc dcfs dcos dcsc dcss dddd ddoc ddrc ddss dfcc dfco dfcs dfds dfrf doco docs dod- dodd dodo dods doff dood doof door doos dorc dord dorf doro dorr dors doso doss drfc drod drof drrs dscc dscr dscs dsdr dsfc dsos dsrc dsrr dssc fccf fcds fcsc fdoc fdos ffcc ffff ffrr ffss foco focs fofo food foof foos for- ford foro forr fors foso foss frcc frfc fros frsc frso fscc fsfo fssc fssf occc ocds ocos ocro ocrr ocrs oddd odds odoo odor odos odso ofcr ofdr off- offc offo offr offs ofor oocr ooff oofs oooo ooos oord orco orcs ordo ords orff orfs oro- orof oror oros orro orrs orso oscc osco osoo osor osos osrd osro ossd osso rccc rccs rcdc rcds rcfc rcos rcrd rcsc rcsd rcss rdoc rdos rdso rfds rffc rocc roco rocs rodd rodo rods rofc roff rofo rood roof roor roos rorc roro rosc roso ross rrfc rrrr rscc rscs rsdd rsds rsfc rsos s-os sccc sccs scdc scdf scds scfc scoo scor scr- scrc scrs scsc scsd scso scsr sdcc sdco sddc sdds sdfc sdrc sdrs sdsc sdsf sdss sfcc sfco sfcs sfdc sffc sfor sfos sfrc sfro sfss soco socr socs sodd sodo sods sofo sood soof soor soos sord soro sorr sors soso soss srcc srfc sros srsd sscc sscs ssdc ssdd ssdf ssfc ssoc ssrc ssrs sssc sssf ssss