-ene bbbb bbbs bbeb bbrc bcbc bcbs bccc bccs bcec bcer bces bcnu bcrs bcru bcsc bcsn bcss bcuc bebb bebe becs becu beeb been beer bees bene benn bens benu berc bere bern berr bers beru bes- bese bess beur bner bnrr bnss brcb brce breb brec bree bren brer bres brns brrr brrs brsb brsr bruc brue brun brus bscs bseb bsec bsee bser bses bsns bssc bsse bubb bube bubs bubu bucc buce bucs bucu buen buer bueu bunb bune bunn buns bunu bur- burb bure burn burr burs buru busc buse buss busu buus cbbc cbbs cbcc cbce cbcn cbcr cbcs cbcu cbec cbee cber cbre cbrn cbsc cbse cbsn cbus ccbc ccbn cccb cccc cccs cccu ccee ccnb ccnc ccne ccnr ccns ccnu ccrc ccre ccrs ccsn ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec cees cen- cene cens cer- cerc cere cern cers cesc cese cesr cess cnbc cnes cnrc cnrr cnss crbc crbu crcc crce crcr cre- creb crec cree cren cres creu crne crns crss crub crue crun crus cscb cscc csce cscr cscs csec csee cser csne csrc csrs csse cssr csur csus cub- cubb cube cubs cucc cuce cucn cuer cues cune curb cure curn curr curs cusb cuss cusu ebbc ebbr ebbs ebcc eben eber ebes ebru ebur ebus ecbc ecbe eccb eccc ecce eces ecne ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eens eerc eers eese enb- enbn enbr ence encs enee ener enes ennc enne enns ennu enrs ense ensu enue enur enus erbb erbe ercc erce ereb erec eren erer eres erne erns errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee esen eser eses esne esse essu esus eubc euer eur- eurc eure euse nbbc nbcc nbcs nber ncbc ncbs nccc nccn nccr nccs nccu ncec ncee ncen ncer nces ncnc ncrc ncre ncsc ncse ncss ncue nebb nebe nebn nebr nebs nebu necc nece necr necs neeb neen neer nees nene nens nenu nerc nere nerr ners neru nesb nesc nese nesn nesr ness neuc neue neun neur neuu nnes nnnn nnss nrcs nren nrrc nrsc nscc nscs nseb nsec nser nsnr nsrc nssb nssc nsse nssr nsss nsub nubc nube nubs nuce nucs nucu nuee nuer nunc nune nunn nuns nurc nure nurn nurr nurs nuru nuse nuss nusu rbbb rbbr rbbs rbss rcbc rccb rccc rccs rcnr rcsc rcss rebb rebe rebs rebu recc rece recr recs recu reeb reen rees rene renn rens renu rere rers reru rese resn ress reue reus reuu rnbr rncs rrrr rrun rscc rscn rscs rsee rsnn rsnr rsre rubb rube rubs rubu ruce ruen ruer rues runc rune runn runs rurc rure rurs ruru ruse russ rusu ruun sbbs sbcc sbcs sber sbse sbus sccc scce sccs scec scee scer scnr scr- scrc scre scrn scrs scsc scsn scsr scsu scub scun scur se-c se-e se-n se-s se-u sebe sebs sec- secc sece secn secr secs secu seeb seec seen seer sees seeu sene senn senr sens serb serc sere sern serr sers seru sesc sese sess seur sncc sneb snee sner snes snns snrs snub snur snus srbc srcc sreb srec sres srnn srub ssbn ssbr sscc ssce sscs ssec ssee sses ssns ssrc ssrs sssb sssc ssss sub- subb subs suc- succ sucr sucs suee suen suer sues sueu sun- sunb sune sunn suns sunu sur- surc sure surn surr surs suru sus- suse suss susu suus ubbe uber ucbc uces ucrc ucsb ucsc ucsu uers uesn uess unbe uncc unce uncs uneb unec unee unen uner unes unne unns unrs uns- unsc unus urbe urbs ure- ures urne urns urre urse urss ursu urun urur urus usbc usbe usbr usbs uscc usce uscs usee usen user uses usnc usnr usnu ussb ussc usse ussr usss ussu usun usus uuen uuuu