bbbb bbbs bbeb bcbc bcbs bccc bccs bcec bces bcsc bcss bebb bebe beby becs beeb bees beey bes- bese bess besy beye beys beze bscs bseb bsec bsee bses bssc bsse byce byes bysb byse byss bysy bzyb bzzz cbbc cbbs cbcc cbce cbcs cbec cbee cbsc cbse ccbc cccb cccc cccs ccee ccss cebs cec- cece cecs ceeb ceec cees cesc cese cess ceys ceze cezy cscb cscc csce cscs csec csee csse csys cybb cybc cyc- cycb cycc cycs cyse cyy- cyyc czyz ebbc ebbs ebby ebcc ebes ecbc ecbe eccb eccc ecce eces ecsc ecse ecss eeby eecs eeee eees eese eesy eeze esbs escb esce escs esee eses esse essy eyeb eyec eyes eyey eyez eyse sbbs sbcc sbcs sbse sccc scce sccs sccy scec scee scey scsc scye se-c se-e se-s se-y se-z sebe sebs seby sec- secc sece secs secy seeb seec sees seey seez sesc sese sess seye seys ssby sscc ssce sscs ssec ssee sses sssb sssc ssss syce syes syse syss szss ybbs yccc ycee ycsb yees yess yeye ysby ysee yses ysse ysyb yyyy zebe zees zeze zsss zzzs zzzz