c-cd cccc cccf ccdc ccdf ccdr ccfc ccfd ccff ccoc ccod ccrc ccrf cd-r cddr cfcf cfco cffr cfor coco codd cofc coff cood coof cor- corc cord corf coro corr crcc crcr crdc crfc croc crod croo cror dccc dcfc dddd ddoc ddrc dfcc dfco dfrf doco dod- dodd dodo doff dood doof door dorc dord dorf doro dorr drfc drod drof fccf fdoc ffcc ffff ffrr foco fofo food foof for- ford foro forr frcc frfc occc ocro ocrr oddd odoo odor ofcr ofdr off- offc offo offr ofor oocr ooff oooo oord orco ordo orff oro- orof oror orro rccc rcdc rcfc rcrd rdoc rffc rocc roco rodd rodo rofc roff rofo rood roof roor rorc roro rrfc rrrr