bbbb bcbc bccc bcnu bctc bcuc bnoc bobb bobo bobu boco bocu bonc bonn bono bont bonu boob booc boon boot botb botn boto bott boun bout btcc btob bttb bubb bubo bubu bucc buco bucu bunb bunn buno bunt bunu buon but- buto butt c-bo cbbc cbcc cbcn cbct cbcu cbot cbtc ccbc ccbn cccb cccc cccu ccnb ccnc ccnu ccob ccoc cctb cctc cctt ccuc ccut cnbc cnco cntc cnut cobb cobo cobu coco coct cocu con- conc conn cono cont coob coon coot cotb cotc cotn coto cott cotu coub coun cout ctot cttn cub- cubb cucc cucn cuno cunt cuon cut- cutc cuto cutt nbbc nbbo nbcc nbco ncbc nccc nccn ncct nccu ncnc ncoc nctc nnnn nnot nntn nobc nobo nobu noco noct non- nonn nono nont nonu noo- noob noon nooo noot not- noto nott noun nout ntbc ntcc ntnu ntto ntuc nubc nucu nunc nunn nuno nunt nuoc nuon nutt nutu obbo obon obot ocbc occc occn occt ocon oct- octo onc- onco onct onno onon ont- ontc onto onut oont oooo ootb oto- oton otoo otto ottu oucc oun- out- outb outo ouu- tbcb tbcc tccc tccu tcnn tcon tctc tnbc tncc tnut tobo tobt tobu toco tonb tonn tono tonu toon toot totc toto tott toun tout ttbb ttcn tton tttt tubb tubo tubu tucc tuco tunb tunc tunn tuno tunu tuto tutt tutu tuuo ubbo uboc ubon ucbc ucon ucut uncc unco unct unno unon untb unto unut uocc utto uttu uuno uuoc uuuu