c-cd cccc cccu ccdc ccdn ccdr ccnc ccnr ccnu ccoc ccod ccrc ccuc cd-r cddr cdnc cdon cnco cndd cnrc cnrr coco cocu codd con- conc cond conn cono cood coon cor- corc cord corn coro corr coud coun cour crcc crcr crdc croc crod cron croo cror crud crun cucc cucn cund cuno cuon curd curn curo curr dccc dccu dcon dddd ddoc ddrc dnoc dnrc doco docu dod- dodd dodo donc dond donn dono donr dood doon door dorc dord dorn doro dorr doru douc doud doun dour drno drod dron drou druu duco dudd dudo dudu dunc dunn duno duo- duon durn duro duru duur nccc nccn nccr nccu ncdc ncdn ncdr ncdu ncnc ncnd ncoc ncor ncrc ndcc nddo ndoc ndor ndrc nnnn noco nodo nodu non- nonn nono nonu noo- noon nooo noor nor- norc nord norn noro norr noun nour nrdc nroc nron nrrc nrrd nucu nudc nudd nudo nunc nunn nuno nuoc nuon nurc nurd nurn nurr nuru occc occn ocon ocro ocrr ocur oddd odon odoo odor odou odur onc- oncd onco ondo onno onod onon onor onur oocr oooo oord orco ordn ordo ordu ornc orno oro- oron oror orro oucc oudc oun- ound our- ourn ouro ouu- rccc rcdc rcnr rcon rcrd rdoc rnco rndc rnod rocc roco rodd rodo ronc rond rono rood roon roor rorc roro roru roud roun rrrr rrun rudd rudo runc rund runn runo rurc rurd ruro ruru ruud ruun ucdc ucdd ucon ucrc udon udoo udun uncc unco undo unno unon unro uocc uor- urdu uro- uroo urun urur uuno uuoc uuuu