bbbb bbdd bbdo bbeb bcbc bccc bcde bcec bdbc bddc bebb bebe bebo beck bede bedo beeb beed beek beke beko beo- beod beok bobb bobe bobo boce bock boco bodb bode bodo boec boee boeo boke boko boob booc bood booe book c-bo c-cd cbbc cbcc cbce cbdb cbdc cbdo cbec cbee cbko ccbc cccb cccc ccdc cced ccee ccob ccoc ccod cd-e cddb cdec cec- cece ceco cedd cede cedo ceeb ceec ceke ckbc ckbe ckck ckco ckdo ckob ckoc ckoo cobb cobe cobo coce cock coco codd code coed cok- coke coko coob cood cook d-bo dbcc dcbc dccb dccc dcdb dddd ddoc debe dec- decc decd dece deck deco dedd dede dedo deeb deed deek dek- deke dkdc dobb dobe doce dock doco dod- dodd dode dodo doek doke doko doob dood dook ebbc ebbo ebcc ebed eboe eboo ecbc ecbe eccb eccc ecce ecco ecdc eced ecko eco- ecod eddc edde eddo ede- edoc edod eede eeee eeke eeoc ekco ekeb eked ekek eocd eode kbbb kbbc kbbd kbbe kbbk kbbo kbcb kbce kbck kbco kbdb kbde kbdo kbeb kbec kbed kbee kbek kbeo kbkb kbkk kbko kbob kboc kbod kboe kbok kboo kcbc kcbd kcbk kccb kccc kccd kcck kcdc kcdd kceb kcec kced kcee kceo kckc kckk kcko kcob kcoe kdbb kdcc kdcd kdce kdco kddb kddc kddd kddk kdeb kdec kdkb kdkd kdkk kdko kdoc kdoe kdok kebb kebc kebe keck keco kedb kedc kedd kede kedo keed keek kekb kekc keke keko keok kkbb kkbd kkbe kkbo kkcb kkcd kkck kkco kkdc kkdd kkdo kked kkkk kkob kkoo kobb kobc kobe kobk kobo kocb kocd kock kode kodk kodo koed kokb kokc koke kokk koko koob kooc kook kooo o-eo obbo obec obed obkb oboe obok ocbc occc oce oced ocee ocke odbo oddd oded odeo odoo oec- oecc oedo oeec oked okko okok oobe oooo