c-cd cccc cccf cccp ccdc ccdf ccdp ccdr ccfc ccfd ccff ccoc ccod ccpp ccpr ccrc ccrf ccrp cd-r cddr cfcf cfco cfdp cffr cfor cfpo cfpr cfrp coco cocp codd cofc coff cood coof coop copd copo copp copr cor- corc cord corf coro corp corr cpff cppd crcc crcr crdc crfc croc crod croo crop cror crpc dccc dccp dcfc dcop dcpo dddd ddoc ddpo ddrc dfcc dfco dfrf doco dod- dodd dodo doff dood doof doop door dopo dopp dopr dorc dord dorf doro dorp dorr dpcp dppc drfc drod drof drop fccf fccp fdoc ffcc ffff ffrr foco fofo food foof fopp for- ford foro forr fp-c fpcc fprf frcc frcp frfc frop frpd occc ocfp ocpd ocpp ocro ocrr oddd odoo odop odor odrp ofcr ofdr off- offc offo offr ofor oocr ooff oooo oord opo- opor oppo orco ordo orff oro- orof oror orpc orro pccc pcfc pcod pcpp pcrc pcrd pcrf pdcp pdoc pdpr pdrc pfff pffr pocd poco pod- podd podo poff pood poof poop poor pop- popc popo popp porc poro porr ppcc ppcd ppod pppd pppo pppp pprc pprf prcc prcd prcf prcp prfc pro- proc prod prof proo prop prpd prrd rccc rcdc rcfc rcpd rcpo rcrd rdoc rdpc rffc rocc roco rodd rodo rofc roff rofo rood roof roop roor ropo rorc roro rpdp rpfc rpof rrfc rrrr