-er bbb bbd bbe bbr bbt bdb bdd bde bdr bdt be- beb bed bee ber bet brb brd bre brr brt btb btd bte btr btt dbb dbd dbe dbr dbt ddb ddd dde ddr ddt de- deb ded dee der det drb drd dre drr drt dtb dtd dte dtr dtt ebb ebd ebe ebr ebt ed- edb edd ede edr edt eeb eed eee eer eet erb erd ere err ert etb etd ete etr ett rbb rbd rbe rbr rbt rdb rdd rde rdr rdt re- reb red ree rer ret rrb rrd rrr rrt rtb rtd rte rtr rtt tbb tbd tbe tbr tbt tdb tdd tde tdr tdt te- teb ted tee ter tet trb trd tre trr trt ttb ttd tte ttr ttt

bbbb bbdd bbeb bbet bd-r bebb bebe bede beeb beed beer beet berd bere berr bert bete bett brdt breb bred bree brer bret brrr btdt btrt bttb dbtt dddd ddre debe debt dedd dede deeb deed deer deet der- derb dere derr dete detr dred dree dret dted ebbr ebed eber edde ede- eder eede eeee eete erbb erbe erde ereb ered erer eret erre etbr etee eter etre ette rbbb rbbr rder rebb rebe redd rede redr reeb reed reet rerd rere rert retd rete retr rett rred rrrr rtdt rtee tbrb tddb tedd tede teed teer teet ter- tere terr tete tetr tett tre- tred tree tret trte trtr ttbb tter tttt

-tree b-e-d bbbee bd-re be-er bebed beber bedde bedee beder bedet beebe beede beerd beete berbe berde bered beret berre berte betee beter betre bett- bette bredd brede bredt breed breer breet brerd brere brett brrrr btr-d btr-t ddddd debed deber debet debte dedde dedee deder deede deere derbe derde dered derre deter detre dette drdre dredd drede dreed drere e-dee ebbed ebber ebbet ebert edder eddre edere edred eeeee eerde erbbe erber erdre erede erere erred erte erter etete etree etter rebbe reber rebet redbd redde reder reede reere rerde rere- reree reret reted retee reter rette tbtbt teber tebet teder teerd teret terre tert- teter tetr- tette treed treer treet trere trete trett ttttt

b-tree bbbbbb bedded bedder bedebt beebee beedee beerde beeter berbee berber berede bereet berere berrer berret bertre betere betete betted bettee better bredde breded breder breede breere brette dbette de-err debdeb debere debert debete debret debted debtee deeded deedee deeder derere derrer deterr detete detter dreder ebbert eebree erbree errett r-tree rebred redbed redded redder redere redred redted reeded reeder reteed reteer reteet retere retree retret retted retter t-tree tedded tedder teebee teeder teetee teeter terete terrer terret terter tertre tetede tetete tetter treder treete tretee trette

bbbbbbb beddred bedered beetred beetree berbere bereted berrett bertree breeded breeder brerded debrete debrett deedeed derrett deterre drebber eddered rebreed redbeet reddeer reddere reedbed reteere reterre retrete rettert terere tereted terreer terrere tettete treetee trettre

bbbbbbbb bebetter bederede beedered berebere betbeder betterer deterred deterrer etbetter red-deer redberet reddeber reed-bed reedreed teddered teetered tettered

beebeebee ddddddddd tebe-tebe

betterbeer betterbred debbeebbed

bbbbbbbbbbbbbbb redderdeererred