bbbb bbox bcbc bccc bnoc bobb bobo bock boco bokn boko bonc bonk bonn bono boob booc book boon boox c-bo cbbc cbcc cbcn cbkn cbko cbox ccbc ccbn cccb cccc ccnb ccnc ccob ccoc ckbc ckbx ckck ckco ckcx cknb cknc cknx ckob ckoc ckoo cnbc cnco cobb cobo cock coco cok- coko con- conc conk conn cono coob cook coon cxxx kbbb kbbc kbbk kbbo kbcb kbck kbco kbkb kbkk kbko kbnn kbno kbob kboc kbok kbon kboo kbox kbxb kbxx kc-x kcbc kcbk kcbx kccb kccc kcck kckc kckk kckn kcko kckx kcnb kcno kcob kcon kcox kkbb kkbn kkbo kkcb kkck kkcn kkco kkkk kknb kknn kkno kknx kkob kkon kkoo kkxk kkxx knbb knbc knbn kncb knck kncn knco knkk knnb knnk knob knoc knok knon knox knxx kobb kobc kobk kobn kobo kocb kock kocn kokb kokc kokk kokn koko kokx konc konk kono koob kooc kook koon kooo koxc kxbn kxbx kxkc kxkk kxkx kxnc kxno kxok kxon kxoo kxox kxxk kxxn kxxo kxxx nbbc nbbo nbcc nbco ncbc nccc nccn ncnc ncoc nkok nnnn nobc nobo nock noco noko non- nonn nono nonx noo- noob nook noon nooo obbo obkb obok obon obox ocbc occc occn ocon okko okno okok okon onc- onco onno onon oooo oxo- oxon oxox oxxo xbox xcon xobc xoco xoxo xxxo xxxx