c-cd cccc ccdc ccdn ccdr ccnc ccnr ccoc ccod ccrc ccrt cctc cctt cd-r cddr cdnc cdon cdot cnco cndd cnrc cnrr cnrt cntc cntr coco coct codd con- conc cond conn cono cont cood coon coot cor- corc cord corn coro corr cort cotc cotn coto cott crcc crcr crdc croc crod cron croo cror crot crrt crtc ctor ctot ctrc ctrn cttn dccc dcct dcon dctc dddd ddoc ddot ddrc dnoc dnrc dntt doco doct dod- dodd dodo donc dond donn dono donr dont dood doon door doot dorc dord dorn doro dorr dort dotd doto dott drno drod dron drot dtcc dtor dtot nccc nccn nccr ncct ncdc ncdn ncdr ncnc ncnd ncoc ncor ncrc nctc nctr ndcc nddo ndnt ndoc ndor ndrc ndtc nnnn nnot nntn noco noct nodo non- nonn nono nont noo- noon nooo noor noot nor- norc nord norn noro norr nort not- noto nott nrdc nroc nron nrrc nrrd ntcc ntnd ntrc ntto nttr occc occn occt ocon ocro ocrr oct- octo oddd odon odoo odor odot onc- oncd onco onct ondo onno onod onon onor ont- ontc onto oocr oont oooo oord oort orco ordn ordo ornc orno oro- oron oror orot orro ortc orto otcd oto- oton otoo otor otro otto rccc rcdc rcnr rcon rcrd rctc rdoc rnco rndc rnnt rnod rnot rntd rocc roco rodd rodo ronc rond rono ront rood roon roor root rorc roro rort rotc rotn roto rotr rott rrrr rtcc rtdt rtnd tccc tcdd tcnn tcon tctc tdor tncc tndd toco todd todo todt tonn tono tood toon toor toot torc tord torn toro torr tort totc totd toto totr tott trcc trno troc trod tron troo trot trtc trtr ttcn tton tttt