-ene bbbb bbbs bbeb bbrc bcbc bcbs bccc bccs bcec bcer bces bcrs bcsc bcsn bcss bebb bebe becs beeb been beer bees bene benn bens berc bere bern berr bers bes- bese bess bner bnrr bnss brcb brce breb brec bree bren brer bres brns brrr brrs brsb brsr bscs bseb bsec bsee bser bses bsns bssc bsse cbbc cbbs cbcc cbce cbcn cbcr cbcs cbec cbee cber cbre cbrn cbsc cbse cbsn ccbc ccbn cccb cccc cccs ccee ccnb ccnc ccne ccnr ccns ccrc ccre ccrs ccsn ccss cebs cec- cece cecs ceeb ceec cees cen- cene cens cer- cerc cere cern cers cesc cese cesr cess cnbc cnes cnrc cnrr cnss crbc crcc crce crcr cre- creb crec cree cren cres crne crns crss cscb cscc csce cscr cscs csec csee cser csne csrc csrs csse cssr ebbc ebbr ebbs ebcc eben eber ebes ecbc ecbe eccb eccc ecce eces ecne ecrc ecrr ecsc ecse ecss eecs eeee eees eens eerc eers eese enb- enbn enbr ence encs enee ener enes ennc enne enns enrs ense erbb erbe ercc erce ereb erec eren erer eres erne erns errc erre errs erse esbs escb esce escr escs esee esen eser eses esne esse nbbc nbcc nbcs nber ncbc ncbs nccc nccn nccr nccs ncec ncee ncen ncer nces ncnc ncrc ncre ncsc ncse ncss nebb nebe nebn nebr nebs necc nece necr necs neeb neen neer nees nene nens nerc nere nerr ners nesb nesc nese nesn nesr ness nnes nnnn nnss nrcs nren nrrc nrsc nscc nscs nseb nsec nser nsnr nsrc nssb nssc nsse nssr nsss rbbb rbbr rbbs rbss rcbc rccb rccc rccs rcnr rcsc rcss rebb rebe rebs recc rece recr recs reeb reen rees rene renn rens rere rers rese resn ress rnbr rncs rrrr rscc rscn rscs rsee rsnn rsnr rsre sbbs sbcc sbcs sber sbse sccc scce sccs scec scee scer scnr scr- scrc scre scrn scrs scsc scsn scsr se-c se-e se-n se-s sebe sebs sec- secc sece secn secr secs seeb seec seen seer sees sene senn senr sens serb serc sere sern serr sers sesc sese sess sncc sneb snee sner snes snns snrs srbc srcc sreb srec sres srnn ssbn ssbr sscc ssce sscs ssec ssee sses ssns ssrc ssrs sssb sssc ssss