cccc cccl cccv cclc cclv ccoc ccvo ckck ckcl ckco ckcv ckoc ckoo ckvl ckvo clok cloo cock coco cok- coko col- colk coll colo cook cool covo cvcc k-lo kccc kcck kccl kccv kckc kckk kckl kcko kckv kclc kclk kcll kclv kcol kcvk kcvl kcvo kcvv kkck kkcl kkco kkkk kklc kkll kklo kklv kkol kkoo kkov kkvv klcc klck klcl klkc klkk klkl klko klkv kllc kllk kllv kloc klok klol kloo klov klvk klvl klvo klvv kock kokc kokk koko kolc kolk koll kolo kolv kooc kook kool kooo koov kovc kovk kovo kvcc kvck kvcl kvco kvcv kvkl kvlc kvlo kvlv kvoc kvok kvol kvoo kvov kvvl kvvv lccc llcc lllc llll lloc lloo lo-v locc lock loco lokk loko loll lolo looc look lool lovo lvcc lvov occc oclc okko oklo okok okol olcc ollo olov oolo oooo ovo- ovol ovoo vlcc vloc vlok volc volk voll volo vooc vool vovk vvvv