-ene bbbb bbbs bbeb bcbc bcbs bccc bccs bcec bces bcsc bcsn bcss bebb bebe becs beeb been bees bene benn bens bes- bese bess bnss bscs bseb bsec bsee bses bsns bssc bsse cbbc cbbs cbcc cbce cbcn cbcs cbec cbee cbsc cbse cbsn ccbc ccbn cccb cccc cccs ccee ccnb ccnc ccne ccns ccsn ccss cebs cec- cece cecs ceeb ceec cees cen- cene cens cesc cese cess cnbc cnes cnss cscb cscc csce cscs csec csee csne csse ebbc ebbs ebcc eben ebes ecbc ecbe eccb eccc ecce eces ecne ecsc ecse ecss eecs eeee eees eens eese enb- enbn ence encs enee enes ennc enne enns ense esbs escb esce escs esee esen eses esne esse nbbc nbcc nbcs ncbc ncbs nccc nccn nccs ncec ncee ncen nces ncnc ncsc ncse ncss nebb nebe nebn nebs necc nece necs neeb neen nees nene nens nesb nesc nese nesn ness nnes nnnn nnss nscc nscs nseb nsec nssb nssc nsse nsss sbbs sbcc sbcs sbse sccc scce sccs scec scee scsc scsn se-c se-e se-n se-s sebe sebs sec- secc sece secn secs seeb seec seen sees sene senn sens sesc sese sess sncc sneb snee snes snns ssbn sscc ssce sscs ssec ssee sses ssns sssb sssc ssss