bbbb bbci bbdd bbdo bcbc bccc bcci bcuc bdbc bddc bdii bibb bibi bibo bicc bici bico bidi bido bidu bio- bioc bioi biou bobb bobi bobo bobu boco bocu bodb bodi bodo bodu boi- boid boii boiu boob booc bood boud bubb bubi bubo bubu bucc buci buco bucu budb budd budi budo budu buic buid buiu c-bo c-cd cbbc cbcc cbcu cbdb cbdc cbdi cbdo cbid ccbc cccb cccc ccci cccu ccdc ccdi ccic ccid ccii ccob ccoc ccod ccuc cddb cdic cdii cdio cibc cibi cibo cicc cici cico cicu cidc cidi ciid ciii ciob ciuc cobb cobi cobo cobu coco cocu codd codi coob cood coub coud cub- cubb cubi cucc cuci cudi cui- d-bo dbcc dcbc dccb dccc dcci dccu dcdb dcii dcio dddd ddoc ddub dibb dibo dici dico didi dido didu diii dioc diou dobb dobi dobu doci doco docu dod- dodd dodi dodo doid doob dood doub douc doud dub- dubb dubc dubu duco dudd dudo dudu duid duo- ibdo ibid icbc icbd iccb iccc icci icco iccu icdc icdd icoc icod icub iddo idic idid idio idoc idub iduo iicd iiii iiio iioi iioo iiuc iobi ioci iod- iodd iodo ioii ioio iooi iooo iucc iuiu obbo obid oboi ocbc occc occi odbo odci oddd oddi odic odio odiu odoo odou oici oido oiii oobi oodi ooid oooo oucc oudc ouii ouu- ubbi ubbo ubic ubid ubii uboc ubod ubud ucbc ucci ucdc ucdd ucio udbc uddi udic udid udoo uocc uuoc uuuu