-er bbb bbe bbl bbr bbs bbt be- beb bee bel ber bes bet blb ble bll blr bls blt brb bre brl brr brs brt bsb bse bsl bsr bss bst btb bte btl btr bts btt ebb ebe ebl ebr ebs ebt eeb eee eel eer ees eet elb ele ell elr els elt erb ere erl err ers ert es- esb ese esl esr ess est etb ete etl etr ets ett lbb lbe lbl lbr lbs lbt leb lee lel ler les let llb lle lll llr lls llt lrb lrr lrs lrt lsb lse lsl lsr lss lst ltb lte ltl ltr lts ltt rbb rbe rbl rbr rbs rbt re- reb ree rel rer res ret rle rll rlr rls rlt rrb rrl rrr rrs rrt rsb rse rsl rsr rss rst rtb rte rtl rtr rts rtt sbb sbe sbl sbr sbs sbt se- seb see sel ser ses set slb sle sll slr sls slt sr- srb sre srl srr srs srt ss- ssb sse ssl ssr sss sst stb ste stl str sts stt tbb tbe tbl tbr tbs tbt te- teb tee tel ter tes tet tle tll tlr tls tlt trb tre trl trr trs trt tsb tse tsl tsr tss tst ttb tte ttl ttr tts ttt

bbbb bbbs bbeb bbet bblb bbls bebb bebe beeb beel beer bees beet bele bell bels belt bere berr bers bert bes- bese bess best bete bets bett blbt bleb blee bles blet blls blss blst blts breb bree brel brer bres bret brls brrr brrs brsb brsr brst bseb bsee bser bses bset bsse bsts btrt btss bttb ebbr ebbs ebel eber ebes eeee eees eele eels eers eese eete eets el-b elbe elee eler eles elet elle ells else elst elte elts erbb erbe ereb erel erer eres eret erle erll erre errs erse erst ertl erts esbs esee esel eser eses eset esse essl esst este estr ests etbr etee etel eter etes etre ette lblr lbrs lbrt leel leer lees leet lele lell lere lert lese less lest lete lets lett llbs lles llet llll lrrr lrse lrst lrts ls-r lses lset lssr lsts ltbl ltee ltrs ltsr lttr rbbb rbbr rbbs rble rbsl rbss rbst rebb rebe rebs reeb reel rees reet relb rele rell rels relt rere rers rert rese ress rest rete retr rets rett rlee rlls rrle rrrr rsee rsre rssl rsts rtee rtes rtle rtls rtlt rtss rtts sbbs sber sbse sbst se-e se-s se-t sebe sebs sebt seeb seel seer sees seet selb sele sell sels selt serb sere serr sers sert sese sess sest set- sete setl sets sett sleb slee sler sles slet slre slrs slst slts sreb sres srtr ssbr ssee sses sset ssle sslt ssrl ssrs sssb ssss sstb sstl ssts stbs stee stel ster stes stet stle stlt stre strs stss sttr tbbs tbrb tbst teel teer tees teet tel- tele tell tels telt ter- tere terr ters tese tesl tess test tete tetr tets tett tlrs tre- tree tres tret trst trte trtr tses tset tsse tssr tsst tsts ttbb tter ttss tttt

-tree bbbee bbser be-er bebel beber bebes beebe beebs beele beers beest beete beets belee beles belet bellb belle bells belts berbe berel beres beret berle berre berse berte berts besee beset besse beste bests betee betel beter betes betle betre betrs bett- bette betts blebs bleer blees bleet blere blese bless blest blete blets breel breer brees breet brell brels brere brers brese bress brest brets brett brrrr btr-t ebber ebbet ebble ebell eberl ebers ebert eeeee eeler eleet elele elers eless elest elets ellel eller elles ellet elser elses eltrs erbbe erber erebs erere erest erets erles erres erses erste ersts erte ertel erter ertes esels esere esrel essel esser esses essse estee estel ester estes estet estre etest etete etree etres ettel etter ettes ettle lebel leber lebes lebet leell leere leers leert leese leest leets leles lelle lerer leser lesse leste letbe letre lette letts llers llrrs lsers rebbe rebel reber rebet rebts reels reere reese reest relee reles relet relte rere- reree reres reret resee resel reses reset resse reste restr rests retee retel reter retes rette retts rless rlrts sebbe sebes sebet seebe seele seels seere seers seese seest seete selbe seler seles selle sells sellt selte serbs serer seres seret serle serre serse serss sert- serte serts seser seses sesse seste setee setel seter setle setse sette setts slebs sleer sleet sless slete slsts sssrb sssss steel steer stees steet stele stell stere sterr sters stert stete stets strbe streb stree strel stret strrs tbtbt teber tebet teebs teele teell teers teese teest teets tele- teler teles tell- telle tells teres teret terre terrs terse tert- tesbl tesel tesle tesse teste tests tetel teter tetes tetle tetr- tette tlell tlett tllbr treer trees treet trele trere tres- trese tress trest trete trets trett tsebe tseel tsere tsets tstlt ttest ttttt

b-reel b-tree bbbbbb bbsers beebee beebes beeler beerse beerst beesel beeste beeter beetle belber beless belett beller belles bellet belser belses beltel belter beltre berbee berber berbes bereel bereet berere berest berets berles berrer berres berret bersee berset bertel bertes bertre besbes besbre besert besets besler bessel besser besses besset bester betell betels betere betete bettee bettel better bettes bettle bleere blesle blesse brebel brebes breere breese breest breles breres bresle bresse breste brests brette bretts bs-tbs ebbers ebbert ebbest ebbets eberle eberts eblees eebree eelers eersel elbert eleele ellers ellett elsets elster erbree eretes errest errett erster essebt essell essert essess esssse estees estell esters estree estres estter esttes lebert lebret leelee leerer leeser leesse leeste leetle lelese lerret lesere leslee lessee lesser lesses lester lestes lestre letsbe letsee letter lettes lettre lettrs r-less r-tree re-let rebbes rebble rebell rebels rebets rebtel reeler reeser reeses reesle reests relees relese relets reller rereel rerees resees resell resels resets ressel rester restes restle restte reteer retees