-ene bbbb bbbs bbeb bcbc bcbs bccc bccs bcec bces bcnu bcsc bcsn bcss bcuc bebb bebe becs becu beeb been bees bene benn bens benu bes- bese bess bnss bscs bseb bsec bsee bses bsns bssc bsse bubb bube bubs bubu bucc buce bucs bucu buen bueu bunb bune bunn buns bunu busc buse buss busu buus cbbc cbbs cbcc cbce cbcn cbcs cbcu cbec cbee cbsc cbse cbsn cbus ccbc ccbn cccb cccc cccs cccu ccee ccnb ccnc ccne ccns ccnu ccsn ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec cees cen- cene cens cesc cese cess cnbc cnes cnss cscb cscc csce cscs csec csee csne csse csus cub- cubb cube cubs cucc cuce cucn cues cune cusb cuss cusu ebbc ebbs ebcc eben ebes ebus ecbc ecbe eccb eccc ecce eces ecne ecsc ecse ecss ecsu ecus eecs eeee eees eens eese enb- enbn ence encs enee enes ennc enne enns ennu ense ensu enue enus esbs escb esce escs escu esee esen eses esne esse essu esus eubc euse nbbc nbcc nbcs ncbc ncbs nccc nccn nccs nccu ncec ncee ncen nces ncnc ncsc ncse ncss ncue nebb nebe nebn nebs nebu necc nece necs neeb neen nees nene nens nenu nesb nesc nese nesn ness neuc neue neun neuu nnes nnnn nnss nscc nscs nseb nsec nssb nssc nsse nsss nsub nubc nube nubs nuce nucs nucu nuee nunc nune nunn nuns nuse nuss nusu sbbs sbcc sbcs sbse sbus sccc scce sccs scec scee scsc scsn scsu scub scun se-c se-e se-n se-s se-u sebe sebs sec- secc sece secn secs secu seeb seec seen sees seeu sene senn sens sesc sese sess sncc sneb snee snes snns snub snus ssbn sscc ssce sscs ssec ssee sses ssns sssb sssc ssss sub- subb subs suc- succ sucs suee suen sues sueu sun- sunb sune sunn suns sunu sus- suse suss susu suus ubbe ucbc uces ucsb ucsc ucsu uesn uess unbe uncc unce uncs uneb unec unee unen unes unne unns uns- unsc unus usbc usbe usbs uscc usce uscs usee usen uses usnc usnu ussb ussc usse usss ussu usun usus uuen uuuu