cccc cccl cclc ccoc ccrc ccrl ckck ckcl ckco ckoc ckoo ckor ckrc clok cloo clor clro cock coco cok- coko col- colk coll colo cook cool cor- corc cork corl coro corr crcc crcr crkc crkl croc crok crol croo cror k-lo kccc kcck kccl kccr kckc kckk kckl kcko kckr kclc kclk kcll kclr kcol kcor kcrc kcro kcrr kkck kkcl kkco kkcr kkkk kklc kkll kklo kkol kkoo kkor kkrc kkrk kkrl kkro kkrr klcc klck klcl klcr klkc klkk klkl klko klkr kllc kllk kloc klok klol kloo klor klrc klrk klrr kock kokc kokk koko kokr kolc kolk koll kolo kolr kooc kook kool kooo koor korc kork korl koro korr krcc krcl krco krkc krkk krko krkr krlc kroc krok krol kroo kror krrc krrk krrl krro krrr lccc lcor lcrl llcc lllc llll lloc lloo locc lock loco lokk loko loll lolo looc look lool loor lork loro lroc lrrc lrrr occc oclc ocrl ocro ocrr okko oklo okok okol okor okro olcc ollo olor oocr oolo oooo orco orko orlo oro- orok oror orro rccc rocc rock roco rokk roko rokr rolk roll rolo rook rool roor rorc rork roro rrrr