bbbb bbdd bbdo bcbc bccc bdbc bddc bobb bobo bock boco bodb bodo boko boob booc bood book c-bo c-cd cbbc cbcc cbdb cbdc cbdo cbko ccbc cccb cccc ccdc ccob ccoc ccod cddb ckbc ckck ckco ckdo ckob ckoc ckoo cobb cobo cock coco codd cok- coko coob cood cook d-bo dbcc dcbc dccb dccc dcdb dddd ddoc dkdc dobb dock doco dod- dodd dodo doko doob dood dook kbbb kbbc kbbd kbbk kbbo kbcb kbck kbco kbdb kbdo kbkb kbkk kbko kbob kboc kbod kbok kboo kcbc kcbd kcbk kccb kccc kccd kcck kcdc kcdd kckc kckk kcko kcob kdbb kdcc kdcd kdco kddb kddc kddd kddk kdkb kdkd kdkk kdko kdoc kdok kkbb kkbd kkbo kkcb kkcd kkck kkco kkdc kkdd kkdo kkkk kkob kkoo kobb kobc kobk kobo kocb kocd kock kodk kodo kokb kokc kokk koko koob kooc kook kooo obbo obkb obok ocbc occc odbo oddd odoo okko okok oooo