cccc cccu ccnc ccnr ccnu ccoc ccrc ccuc cnco cnrc cnrr coco cocu con- conc conn cono coon cor- corc corn coro corr coun cour crcc crcr croc cron croo cror crun cucc cucn cuno cuon curn curo curr nccc nccn nccr nccu ncnc ncoc ncor ncrc nnnn noco non- nonn nono nonu noo- noon nooo noor nor- norc norn noro norr noun nour nroc nron nrrc nucu nunc nunn nuno nuoc nuon nurc nurn nurr nuru occc occn ocon ocro ocrr ocur onc- onco onno onon onor onur oocr oooo orco ornc orno oro- oron oror orro oucc oun- our- ourn ouro ouu- rccc rcnr rcon rnco rocc roco ronc rono roon roor rorc roro roru roun rrrr rrun runc runn runo rurc ruro ruru ruun ucon ucrc uncc unco unno unon unro uocc uor- uro- uroo urun urur uuno uuoc uuuu