-er bbb bbe bbm bbr bbt bbx be- beb bee bem ber bet bex bmb bme bmm bmr bmt bmx brb bre brm brr brt brx btb bte btm btr btt btx bxb bxm bxx ebb ebe ebm ebr ebt ebx eeb eee eem eer eet eex em- emb eme emm emr emt emx erb ere erm err ert etb ete etm etr ett etx ex- exe exr ext exx m-r mbb mbe mbm mbr mbt mbx meb mee mem mer met mex mmb mme mmm mmr mmt mmx mrb mre mrm mrr mrt mrx mtb mte mtm mtr mtt mtx mxr rbb rbe rbm rbr rbt rbx re- reb ree rem rer ret rex rmb rme rmm rmr rmt rmx rrb rrm rrr rrt rtb rte rtm rtr rtt rtx rxr t-x tbb tbe tbm tbr tbt te- teb tee tem ter tet tex tmb tme tmm tmr tmt tmx trb tre trm trr trt trx ttb tte ttm ttr ttt ttx txe txt xbe xbr xbx xee xem xer xet xex xmm xmr xmt xmx xrt xrx xtm xtr xtx xxx

bbbb bbeb bbet bebb bebe beeb beem beer beet beme bere berm berr bert bete bett breb bree brem brer bret brex brrm brrr btex btrt bttb ebbr eber eeee eete eext embe embr emer emet emex emme emre emte er-x erbb erbe ereb erem erer eret erme erre etbr etee etem eter etre etrm ette exer exmr exrx exte extr mebe meem meer meet meme memr memx mer- merb mere merm mert met- mete mett mexx mmmm mmxx mrbb mrbm mreb mree mrtm mrtt mtre mtrr mttr rbbb rbbr rbmx rebb rebe reeb reem reet reme rere rert rete retr rett rexx rrrr rtee rtex tbrb teem teer teet teme ter- tere term terr tete tetr tett tetx text tmbr tmtt tre- tree trem tret trex trmb trte trtr ttbb tter tttt txtr xbee xeer xeme xer- xert xexe xxxx

-tree bbbee be-er beber beebe beete bembe bemer bemet berbe beret berme berre berte betee beter betre bett- bette bmxer bre-x breem breer breet breme bremm brere brett bretx brmmm brrrr btr-t ebber ebbet ebert eeeee embee ember emeer emere emert emmer emmet emtee erbbe erber erem- erere erte erter etete etext etree etter exeem exeme exert exmet exter extre mbebe mbere mbret mebbe meere meete membe memer memex merer meret merre merte meter metr- metre metrx mette mexer mmmmm mrmet mt-te mt-tm mt-tr mt-tt mtree rebbe reber rebet reeme reere remee remer remet remex rere- reree reret retee retem reter retex rette rexer rtext t-rex tbtbt teber tebet teeme tembe terem teret terex terme terre tert- teter tetex tetr- tette texte treer treet treme trere trete trett ttttt xbxrx xerem xerte xetex xexex xmmer xterm xtext xtree

b-tree bbbbbb beebee beebem beembe beemer beerme beeter bembex bemeet bemete berbee berber bereet berere bermet berrer berret bertem bertre beteem betere betete bettee better bexter breere bremer brette e-text ebbert eebree embree emeere emeter emmert emmett erbree errett exeter m-tree mbembe meeter meetme meetre member membre mememe memere merete mermer mermet merrem merret merter met-rx meteer metrer metter mettet r-tree remeet remete reteer reteet retere reterm retree retret retter t-tree teebee teemer teerme teetee teeter tembre temere terete termer terrer terret terrex terter tertre tetete tetter texmex texter textme treete tremet tremex tretee trette x-tree xerert xtreme

bbbbbbb beetree berbere berrett bertree betemme brember bremete bremmer bx-tree e-meter eemmeer emebert extreme memmert mereret merrett mertert metreme metrete r-meter reexert rembert remeber reteere reterre retrete rettert terere terreer terrere tettete tex-mex treetee trettre x-treme xxxxxxx

bbbbbbbb bebetter berebere betterer bremette embetter erembert etbetter extremer meremere remember remembre tremembe

beebeebee emmermeer exerttrex tebe-tebe

betterbeer mememememe mettembert rememberer rememberme

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