bbbb bblb bcbc bccc bccl bcvo blkb blob bloc blok bloo bobb bobo bock boco boko bolk boll bolo boob booc book bool bovo c-bo cbbc cbcc cbcl cbkl cbko cblb cblc cbol cbvb ccbc cccb cccc cccl cccv cclc cclv ccob ccoc ccvo ckbc ckck ckcl ckco ckcv ckob ckoc ckoo ckvl ckvo clob clok cloo cobb cobo cock coco cok- coko col- colb colk coll colo coob cook cool covo cvcc k-lo kbbb kbbc kbbk kbbl kbbo kbcb kbck kbcl kbco kbkb kbkk kbkl kbko kbkv kblb kbll kblo kblv kbob kboc kbok kboo kbov kbvb kbvc kbvo kcbc kcbk kcbl kccb kccc kcck kccl kccv kckc kckk kckl kcko kckv kclc kclk kcll kclv kcob kcol kcvk kcvl kcvo kcvv kkbb kkbl kkbo kkcb kkck kkcl kkco kkkk kklb kklc kkll kklo kklv kkob kkol kkoo kkov kkvv klbb klbc klbl klcb klcc klck klcl klkc klkk klkl klko klkv kllb kllc kllk kllv klob kloc klok klol kloo klov klvb klvk klvl klvo klvv kobb kobc kobk kobo kocb kock kokb kokc kokk koko kolb kolc kolk koll kolo kolv koob kooc kook kool kooo koov kovc kovk kovo kvbc kvbl kvcb kvcc kvck kvcl kvco kvcv kvkl kvlb kvlc kvlo kvlv kvob kvoc kvok kvol kvoo kvov kvvl kvvv lbcc lcbc lccc llcc lllc llll lloc lloo lo-v lob- lobb lobo locc lock loco lokk loko loll lolo loob looc look lool lovo lvcc lvov obbo obkb obok obol ocbc occc oclc okko oklo okok okol olbo olcc ollo olov oolo oooo ovo- ovol ovoo vbcc vlcc vloc vlok volc volk voll volo vooc vool vovk vvob vvvv