cccc ccoc ccrc ckck ckco ckcy ckoc ckoo ckor ckoy ckrc ckry cock coco cok- coko coky cook cor- corc cork coro corr cory coyo coyr crcc crcr crkc croc crok croo cror croy cry- cryo cyc- cycc cyrk cyy- cyyc kccc kcck kccr kccy kckc kckk kcko kckr kcky kcor kcrc kcro kcrr kcry kcyk kcyy kkck kkco kkcr kkcy kkkk kkoo kkor kkoy kkrc kkrk kkro kkrr kkyc kkyy kock kokc kokk koko kokr koky kooc kook kooo koor korc kork koro korr koyo koyy krcc krco krkc krkk krko krkr krky kroc krok kroo kror kroy krrc krrk krro krrr krry kryk kryo kryy kycc kyck kycr kykc kykk kykr kyky kyok kyoo kyor kyoy kyrc kyrk kyro kyyk kyyo kyyy occc ocro ocrr okko okok okor okro okyo oocr ooky oooo oory orco orko oro- orok oror oroy orro orry rccc rcyc rocc rock roco rokk roko rokr roky rook roor rorc rork roro rory rrrr ryck yccc ykko yock yoko yoky yook york yoro yory yoyo yyyy