bbbb bblb bcbc bccc bccl bctc blbt blno blob bloc blon bloo blot bnoc bobb bobo boco boll boln bolo bolt bonc bonn bono bont boob booc bool boon boot botb botn boto bott btcc btcl btob bttb c-bo cbbc cbcc cbcl cbcn cbct cblb cblc cbln cbol cbot cbtc cbtl ccbc ccbn cccb cccc cccl cclc ccnb ccnc ccob ccoc cctb cctc cctl cctt clob clon cloo clot cltb cltc cnbc cnbl cnco cntc cobb cobo coco coct col- colb coll coln colo colt con- conc conn cono cont coob cool coon coot cotb cotc cotn coto cott ctol ctot cttn lbcc lcbc lccc lctl lcto llcc lllc llll lloc lloo lntc lob- lobb lobo locc locn loco loll lolo lono lont loob looc lool loon loot lotl loto lott ltbl ltcc ltnt lttc nbbc nbbo nbcc nbco ncbc nccc nccn ncct nclc ncln ncnc ncoc nctc nlcc nnnn nnot nntn nobc nobo nocl noco noct noll nolo nolt non- nonn nono nont noo- noob nool noon nooo noot not- noto nott ntbc ntcc ntto obbo obol obon obot ocbc occc occn occt oclc ocon oct- octo olbo olcc ollo olon olot onc- onco onct onno onon ont- ontc onto oolo oont oooo ootb otcl oto- oton otoo otto tbcb tbcc tccc tcnn tcon tctc tlco tlon tnbc tncc tobo tobt toco tol- toll tolo tolt tonb tonn tono tool toon toot totc toto tott ttbb ttcn tton tttt