bbbb bbdd bbdo bbeb bcbc bccc bcde bcec bcuc bcvo bdbc bddc bebb bebe bebo becu bede bedo bedu beeb beed beo- beod bevo bobb bobe bobo bobu boce boco bocu bodb bode bodo bodu boec boee boeo boob booc bood booe boud boue bove bovo bubb bube bubo bubu bucc buce buco bucu budb budd bude budo budu bueu buvd buve bvdu c-bo c-cd cbbc cbcc cbce cbcu cbdb cbdc cbdo cbec cbee cbvb cbve ccbc cccb cccc cccu cccv ccdc cced ccee ccob ccoc ccod ccuc ccvo cd-e cddb cdec cdvd cebu cec- cece ceco cedd cede cedo cedu ceeb ceec ceou cevo cobb cobe cobo cobu coce coco cocu codd code coed coob cood coub coud coue cove covo cub- cubb cube cucc cuce cude cued cuve cvcc d-bo dbcc dcbc dccb dccc dccu dccv dcdb dcvd dddd ddoc ddub debe debu dec- decc decd dece deco dedd dede dedo dedu deeb deed deev deue deve devo dobb dobe dobu doce doco docu dod- dodd dode dodo doob dood doub douc doud doue dove dub- dubb dubc dube dubu duce duco dudd dude dudo dudu duo- duve ebbc ebbo ebcc ebed eboe eboo ecbc ecbe eccb eccc ecce ecco ecdc eced eco- ecod ecou eddc edde eddo ede- edoc edod edou educ edve eede eedu eeee eeoc eocd eode eubc eucd eude evdb evoe evoo o-eo obbo obec obed oboe ocbc occc oce oced ocee odbo oddd oded odeo odoo odou oec- oecc oedo oeec oobe oooo oucc oudc oude oued ouu- ovde ovee ovo- ovod ovoo ubbe ubbo uboc ubod ubud ucbc ucdc ucdd udbc udev udoo uocc uovo uuoc uuuu uv-b uv-c uvvu vbcc vdcc vdec vdub vecc vedc vede vedo veve vevo voce vode vodo voeu vooc voud voue vuco vudu vvob vvvv