bbbb bblb bbox bcbc bccc bccl blkb blob bloc blok bloo bobb bobo bock boco boko bolk boll bolo boob booc book bool boox c-bo cbbc cbcc cbcl cbkl cbko cblb cblc cbol cbox ccbc cccb cccc cccl cclc cclx ccob ccoc ccxl ckbc ckbx ckck ckcl ckco ckcx ckob ckoc ckoo clob clok cloo clox clxx cobb cobo cock coco cok- coko col- colb colk coll colo coob cook cool cxxx k-lo kbbb kbbc kbbk kbbl kbbo kbcb kbck kbcl kbco kbkb kbkk kbkl kbko kblb kbll kblo kbob kboc kbok kboo kbox kbxb kbxl kbxx kc-x kcbc kcbk kcbl kcbx kccb kccc kcck kccl kckc kckk kckl kcko kckx kclc kclk kcll kclx kcob kcol kcox kcxl kkbb kkbl kkbo kkcb kkck kkcl kkco kkkk kklb kklc kkll kklo kklx kkob kkol kkoo kkxk kkxl kkxx klbb klbc klbl klcb klcc klck klcl klcx klkc klkk klkl klko klkx kllb kllc kllk klob kloc klok klol kloo klox klxk klxx kobb kobc kobk kobo kocb kock kokb kokc kokk koko kokx kolb kolc kolk koll kolo koob kooc kook kool kooo koxc kxbl kxbx kxcl kxkc kxkk kxkx kxlb kxlc kxll kxlo kxlx kxok kxol kxoo kxox kxxk kxxl kxxo kxxx lbcc lcbc lccc llcc lllc llll lloc lloo lob- lobb lobo locc lock loco lokk loko loll lolo loob looc look lool lox- loxo lxxx obbo obkb obok obol obox ocbc occc oclc okko oklo okok okol olbo olcc ollo oolo oooo oxo- oxox oxxo xbox xcbl xloc xlox xobc xoco xolo xoxo xxxo xxxx