c-cd cccc cccf ccdc ccdf ccdn ccdr ccfc ccfd ccff ccnc ccnf ccnr ccoc ccod ccrc ccrf cd-r cddr cdnc cdnf cdon cfcf cfcn cfco cffr cfnr cfor cfrn cnco cndd cnrc cnrr coco codd cofc coff con- conc cond conf conn cono cood coof coon cor- corc cord corf corn coro corr crcc crcr crdc crfc croc crod cron croo cror dccc dcfc dcon dddd ddoc ddrc dfcc dfco dfrf dnoc dnrc doco dod- dodd dodo doff donc dond donn dono donr dood doof doon door dorc dord dorf dorn doro dorr drfc drno drod drof dron fccf fdoc ffcc ffff ffrr fndd fndn fndr foco fofo fond fono food foof foon for- ford forn foro forr frcc frcn frfc fron nccc nccf nccn nccr ncdc ncdn ncdr ncfc ncnc ncnd ncoc ncor ncrc ndcc nddo ndoc ndor ndrc ndrf nfdc nfff nfon nnnn noco nodo non- nonn nono noo- noon nooo noor nor- norc nord norf norn noro norr nrdc nrfc nroc nron nrrc nrrd occc occn ocon ocro ocrr oddd odon odoo odor ofcr ofdr off- offc offo offr ofno ofor onc- oncd oncf onco ondo onno onod onon onor oocr ooff oooo oord orco ordn ordo orff ornc orno oro- orof oron oror orro rccc rcdc rcfc rcnr rcon rcrd rdoc rffc rnco rndc rndf rnod rocc roco rodd rodo rofc roff rofo ronc rond rono rood roof roon roor rorc roro rrfc rrrr