bbbb bbfc bcbc bcbg bccc bcfc bcof bctc bfgf bftt bgfc bobb bobo boco boff bogg bogo bogt boob booc boof boog boot botb boto bott btcc btfc btob bttb c-bo cbbc cbcc cbct cbfb cbfc cbgb cbot cbtc cbtf ccbc cccb cccc cccf ccfc ccff ccgc ccgt ccob ccoc cctb cctc cctt cfbc cfbt cfcb cfcf cfco cffb cfgo cftc cgcc cgcg cgfc cobb cobo coco coct cofc coff coft cogo coob coof coot cotb cotc coto cott ctcf ctfc ctfo ctgf ctot fccf fcot fcto ffcc ffff fftf fobt foco fofo fogg fogo foof foot foto fott ft-c ftfc gbbo gbfc gc-c gcbc gccc gccf gcfc gctc gfcf ggbt ggfg gggg gobo goff gogo goof goog goot goto gott gtco gtfc gtfo obbo obot ocbc occc occt oct- octo off- offc offo ofgo ogb ogog ooff oooo ootb otfc oto- otof otog otoo otto tbcb tbcc tccc tcfc tcfg tctc tfot tftc tgcc tgtc tobo tobt toco toff tofo toft togo togt toof toot totc toto tott ttbb ttfc ttff tttt