-ene bbbb bbbs bbeb bbet bbrc bcbc bcbs bccc bccs bcec bcer bces bcet bcrs bcsc bcsn bcss bctc bcts bebb bebe becs beeb been beer bees beet bene benn bens bent berc bere bern berr bers bert bes- bese bess best betc bete bets bett bner bnet bnrr bnss brcb brce breb brec bree bren brer bres bret brns brrr brrs brsb brsr brst brtc bscs bseb bsec bsee bser bses bset bsns bssc bsse bsts btcc btcs btec bten btrc btrt btss bttb cbbc cbbs cbcc cbce cbcn cbcr cbcs cbct cbec cbee cber cbet cbre cbrn cbrt cbsc cbse cbsn cbtc ccbc ccbn cccb cccc cccs ccee ccnb ccnc ccne ccnr ccns ccrc ccre ccrs ccrt ccsn ccss ccst cctb cctc cctt cebs cec- cece cecs cect ceeb ceec cees cen- cene cens cent cer- cerc cere cern cers cert cesc cese cesr cess cest cet- cete cets cnbc cnes cnet cnrc cnrr cnrt cnss cntc cntr crbc crcc crce crcr cre- creb crec cree cren cres cret crne crns crrt crss crst crtc crts cscb cscc csce cscr cscs csec csee cser cset csne csrc csrs csse cssr cstc cstr csts ctbs ctec cten ctne ctns ctrc ctrn ctrs ctsc ctsn ctss cttn ctts ebbc ebbr ebbs ebcc eben eber ebes ecbc ecbe eccb eccc ecce ecct eces ecne ecrc ecrr ecsc ecse ecss ect- ectc ects eecs eeee eees eens eent eerc eers eese eetc eete eets enb- enbn enbr ence encs enee ener enes ennc enne enns enrs ense enst ent- ente entr ents erbb erbe ercc erce ereb erec eren erer eres eret erne erns errc erre errs erse erst erts esbs escb esce escr escs esee esen eser eses eset esne esse esst estc este estr ests etbc etbr etcc etcs etec etee eten eter etes etne etnr etns etre ette ettn nbbc nbcc nbcs nber ncbc ncbs nccc nccn nccr nccs ncct ncec ncee ncen ncer nces ncnc ncrc ncre ncsc ncse ncss ncst nctc ncte nctr nebb nebe nebn nebr nebs necc nece necr necs nect neeb neen neer nees neet nene nens nent nerc nere nerr ners nert nesb nesc nese nesn nesr ness nest net- netb nete nets nett nnes nnnn nnss nntn nrcs nren nrrc nrsc nrts nscc nscs nseb nsec nser nsnr nsrc nssb nssc nsse nssr nsss nstc nsts ntbc ntcc nter ntes ntrc ntsb ntsc ntss nttr rbbb rbbr rbbs rbss rbst rcbc rccb rccc rccs rcet rcnr rcsc rcss rctc rcts rebb rebe rebs recc rece recr recs rect reeb reen rees reet rene renn rens rent rere rers rert rese resn ress rest rete retr rets rett rnbr rncs rnnt rrrr rscc rscn rscs rsee rsnn rsnr rsre rsts rtcc rtce rtee rtes rtns rtss rtts sbbs sbcc sbcs sbct sber sbse sbst sbtc sbtn sccc scce sccs scct scec scee scer scet scnr scnt scr- scrc scre scrn scrs scsc scsn scsr scst sctc sctn sctr scts se-c se-e se-n se-s se-t sebe sebs sebt sec- secc sece secn secr secs sect seeb seec seen seer sees seet sene senn senr sens sent serb serc sere sern serr sers sert sesc sese sess sest set- setc sete sets sett sncc sneb snee sner snes snet snns snrs snte sntr srbc srcc srct sreb srec sres srnn srtr ssbn ssbr sscc ssce sscs ssec ssee sses sset ssns ssrc ssrs sssb sssc ssss sstb sstc ssts stbc stbs stcc stcs stec stee sten ster stes stet stnn stnr stns strc stre strn strs stss sttc sttr tbbs tbcb tbcc tbce tbrb tbst tcbs tccc tcnn tctc tcts tecr tecs tect teec teen teer tees teet tenb tenc tene tenn tens tent ter- terc tere tern terr ters tesc tese tess test tete tetr tets tett tnbc tncc tneb tnes tnts trcc tre- trec tree tren tres tret trst trtc trte trtr tsbc tscc tsec tsen tses tset tsse tssr tsst tstc tsts ttbb ttcn tten tter ttss tttt