bbbb bbch bcbc bcbg bccc bctc bcuc bght bhcc bhut bhuu btcc bttb bubb bubu bucc buch bucu bugg bugh but- butt cbbc cbcc cbct cbcu cbgb cbtc ccbc cccb cccc cccu ccgc ccgt cctb cctc cctt ccuc ccut cgcc cgcg cgtu chch chgb chtt chub chug chut ctgu cub- cubb cucc cut- cutc cuth cutt gc-c gcbc gccc gctc ggbt gggg gghg ghug gubb gubu guch gugb gugg gugh gugu guth gutt gutu hbtu hcbc hccb hccc hcch hcgh hggc hgtc hhgg hhhh htcc hubb huch hucu hugg hugh huhu huth hutt hutu huub tbcb tbcc tccc tccu tch- tchh tchu tctc tgcc tgtc thch thtb thug ttbb tttt tubb tubu tucc tuch tugg tugh tugu tuht tuhu tutt tutu ucbc ucut ugcc ugcg uggt uguu uhuh uttu utug uuuu