bbbb bbng bcbc bcbg bccc bctc bgon bnoc bobb bobo boco bogg bogo bogt bonc bong bonn bono bont boob booc boog boon boot botb botn boto bott btcc btob bttb c-bo cbbc cbcc cbcn cbct cbgb cbot cbtc ccbc ccbn cccb cccc ccgc ccgt ccnb ccnc ccob ccoc cctb cctc cctt cgcc cgcg cnbc cnco cntc cobb cobo coco coct cogo con- conc cong conn cono cont coob coon coot cotb cotc cotn coto cott ctot cttn gbbo gbon gc-c gcbc gccc gctc ggbt gggg gncc gngc gnoo gobo gogo gon- gong gonn gono goog goon goot goto gott gtco nbbc nbbo nbcc nbco ncbc nccc nccn ncct ncnc ncoc nctc ngon ngtn nngn nnnn nnot nntn nobc nobo noco noct nogg nogo nogt non- nong nonn nono nont noo- noob noon nooo noot not- noto nott ntbc ntcc ntto obbo obon obot ocbc occc occn occt ocon oct- octo ogb ogog ogon onc- onco onct ongo onno onon ont- ontc onto oont oooo ootb oto- otog oton otoo otto tbcb tbcc tccc tcnn tcon tctc tgcc tgtc tnbc tncc tobo tobt toco togo togt tonb tong tonn tono toon toot totc toto tott ttbb ttcn tton tttt