cccc ccnc ccnr ccny ccoc ccrc cnco cnrc cnrr coco con- conc conn cono cony coon cor- corc corn coro corr cory coyn coyo coyr crcc crcr croc cron croo cror croy cry- cryn cryo cyc- cycc cyn- cyno cyon cyy- cyyc cyyn nccc nccn nccr ncnc ncoc ncor ncrc nnnn noco non- nonn nono noo- noon nooo noor nor- norc norn noro norr nory noyo nroc nron nrrc nycc nyco nycy nyny nyon nyro occc occn ocon ocro ocrr onc- onco onno onon onor onoy oocr oooo oory orco ornc orno orny oro- oron oror oroy orro orry oyon rccc rcnr rcon rcyc rnco rocc roco ronc rono rony roon roor rorc roro rory royn rrrr rynn ryon yccc ynon yono yoon yorn yoro yory yoyn yoyo yron yryn yyyy