bbbb bbdd bbdo bcbc bccc bcnu bcuc bdbc bddc bnoc bobb bobo bobu boco bocu bodb bodo bodu bonc bond bonn bono bonu boob booc bood boon boud boun bubb bubo bubu bucc buco bucu budb budd budo budu bunb bund bunn buno bunu buon c-bo c-cd cbbc cbcc cbcn cbcu cbdb cbdc cbdn cbdo cbnd ccbc ccbn cccb cccc cccu ccdc ccdn ccnb ccnc ccnu ccob ccoc ccod ccuc cddb cdnb cdnc cdon cnbc cnco cndd cobb cobo cobu coco cocu codd con- conc cond conn cono coob cood coon coub coud coun cub- cubb cucc cucn cund cuno cuon d-bo dbcc dcbc dccb dccc dccu dcdb dcon dddd ddoc ddub dnoc dobb dobu doco docu dod- dodd dodo donc dond donn dono doob dood doon doub douc doud doun dub- dubb dubc dubu duco dudd dudo dudu dunc dunn duno duo- duon nbbc nbbo nbcc nbco ncbc nccc nccn nccu ncdc ncdn ncdu ncnc ncnd ncoc ndcc nddb nddo ndoc nndb nnnn nobc nobo nobu noco nodo nodu non- nonn nono nonu noo- noob noon nooo noun nubc nucu nudc nudd nudo nunc nunn nuno nuoc nuon obbo obon ocbc occc occn ocon odbo oddd odnb odon odoo odou onc- oncd onco ondo onno onod onon oooo oucc oudc oun- ound ouu- ubbo uboc ubod ubon ubud ucbc ucdc ucdd ucon udbc udon udoo udun unbd uncc unco undo unno unon uocc uuno uuoc uuuu