c-cd cccc ccdc ccdr ccoc ccod ccrc cd-r cddr ckck ckco ckdo ckoc ckoo ckor ckrc ckrd cock coco codd cok- coko cood cook cor- corc cord cork coro corr crcc crcr crdc crkc croc crod crok croo cror dccc dcrk dddd ddoc ddrc dkdc dock doco dod- dodd dodo doko dood dook door dorc dord dork doro dorr drod kccc kccd kcck kccr kcdc kcdd kcdr kckc kckk kcko kckr kcor kcrc kcro kcrr kdcc kdcd kdco kdcr kddc kddd kddk kddr kdkd kdkk kdko kdkr kdoc kdok kdro kkcd kkck kkco kkcr kkdc kkdd kkdo kkkk kkoo kkor kkrc kkrk kkro kkrr kocd kock kodk kodo kokc kokk koko kokr kooc kook kooo koor korc kord kork koro korr krcc krcd krco krdc krdd krdo krdr krkc krkd krkk krko krkr kroc krod krok kroo kror krrc krrk krro krrr occc ocro ocrr oddd odoo odor okko okok okor okro oocr oooo oord orco ordo orko oro- orok oror orro rccc rcdc rcrd rdoc rocc rock roco rodd rodo rokk roko rokr rood rook roor rorc rork roro rrrr