c-cd cccc cccf ccdc ccdf ccdr ccfc ccfd ccff ccoc ccod ccrc ccrf cd-r cddr cfcf cfco cffr cfor cfox cfrx coco codd cofc coff cood coof cor- corc cord corf coro corr crcc crcr crdc crfc croc crod croo cror cxro cxxx dccc dcfc dcxx dddd ddoc ddrc dfcc dfco dfrf do-x doco dod- dodd dodo doff dood doof door dorc dord dorf doro dorr drfc drod drof dxcc dxco dxdc dxdr dxfx dxoc dxrd dxrf dxrr dxrx dxxr dxxx fccf fdoc ffcc ffff ffrr foco fofo food foof for- ford foro forr foxx frcc frfc fxdd occc ocro ocrr oddd odoo odor ofcr ofdr off- offc offo offr ofor oocr ooff oooo oord orco ordo orff oro- orof oror orro oxo- oxof oxox oxxo rccc rcdc rcfc rcrd rdoc rffc rocc roco rodd rodo rofc roff rofo rood roof roor roox rorc roro roxo rrfc rrrr xdcc xdxf xoco xoro xoxo xrcd xrod xxxo xxxx