cccc ccnc ccnr ccoc ccrc ckck ckco cknc ckoc ckoo ckor ckrc cnco cnrc cnrr cock coco cok- coko con- conc conk conn cono cook coon cor- corc cork corn coro corr crcc crcr crkc croc crok cron croo cror kccc kcck kccr kckc kckk kckn kcko kckr kcno kcnr kcon kcor kcrc kcrn kcro kcrr kkck kkcn kkco kkcr kkkk kknn kkno kkon kkoo kkor kkrc kkrk kkrn kkro kkrr knck kncn knco kncr knkk knnk knnr knoc knok knon knor knrk knro kock kocn kokc kokk kokn koko kokr konc konk kono kooc kook koon kooo koor korc kork korn koro korr krcc krcn krco krkc krkk krkn krko krkr krnk krnn krno kroc krok kroo kror krrc krrk krrn krro krrr nccc nccn nccr ncnc ncoc ncor ncrc nkok nkor nnnn nock noco noko non- nonn nono noo- nook noon nooo noor nor- norc nork norn noro norr nroc nron nrrc occc occn ocon ocro ocrr okko okno okok okon okor okro onc- onco onno onon onor oocr oooo orco orko ornc orno oro- orok oron oror orro rccc rcnr rcon rnco rocc rock roco rokk roko rokr ronc ronk rono rook roon roor rorc rork roro rrrr