-er bbb bbd bbe bbg bbl bbr bbt bdb bdd bde bdg bdl bdr bdt be- beb bed bee beg bel ber bet bgb bgd bge bgg bgl bgr bgt blb bld ble blg bll blr blt brb brd bre brg brl brr brt btb btd bte btg btl btr btt dbb dbd dbe dbg dbl dbr dbt ddb ddd dde ddg ddl ddr ddt de- deb ded dee deg del der det dgd dge dgg dgl dgr dgt dl- dlb dld dle dlg dll dlr dlt drb drd dre drg drl drr drt dtb dtd dte dtg dtl dtr dtt ebb ebd ebe ebg ebl ebr ebt ed- edb edd ede edg edl edr edt eeb eed eee eeg eel eer eet egb egd ege egg egl egr egt elb eld ele elg ell elr elt erb erd ere erg erl err ert etb etd ete etg etl etr ett g-d gbd gbe gbg gbl gbr gbt gdb gdd gde gdl gdr gdt ge- geb ged gee geg gel ger get ggb ggd ggg ggr ggt glb gld gle glg gll glr glt grb grd gre grg grl grr grt gtb gtd gte gtg gtl gtr gtt lbb lbd lbe lbg lbl lbr lbt ldb ldd lde ldg ldl ldr ldt leb led lee leg lel ler let lgb lgd lge lgg lgl lgr lgt llb lld lle llg lll llr llt lrb lrd lrg lrr lrt ltb ltd lte ltg ltl ltr ltt rbb rbd rbe rbg rbl rbr rbt rdb rdd rde rdg rdl rdr rdt re- reb red ree reg rel rer ret rgb rgd rge rgg rgr rgt rld rle rlg rll rlr rlt rrb rrd rrg rrl rrr rrt rtb rtd rte rtg rtl rtr rtt tbb tbd tbe tbg tbl tbr tbt tdb tdd tde tdg tdl tdr tdt te- teb ted tee teg tel ter tet tgb tge tgg tgl tgr tgt tld tle tlg tll tlr tlt trb trd tre trg trl trr trt ttb ttd tte ttg ttl ttr ttt

bbbb bbdd bbeb bbet bblb bbrg bd-r bdle bebb bebe bede bedl beeb beed beeg beel beer beet begg beld bele belg bell belt berd bere berg berr bert bete bett blbt bldg bldr bleb bled blee bleg blet blrg brdt breb bred bree breg brel brer bret brrr btdt btrt bttb dbtt dddd ddre debe debt dedd dede deeb deed deeg deel deer deet dege deld dele dell delt der- derb dere derg derr dete detr dgeg dgge dlbd dleg dlrg dred dree dreg drel dret drge dted dtle dtrl ebbr ebed ebel eber edde ede- edel eder edge edle eede eeee eele eerg eete egbe egee egel eger eggb egge egle egre egte el-b elbe elde eldr eled elee eler elet elgg elle elte erbb erbe erde ereb ered erel erer eret erg- ergg erld erle erll erre ertl etbr etee etel eter etre ette gbde gddb gdrt gebe gedd gede geed geel geer geet gege gegg gegl gelb geld gele gelg gell gelt gerb gerd gere gerl gert getb gete getg gett ggbt gggg glde gleb gled glee gleg glet glge glrb grbr greb gree greg gret grrl grrr gtbr gtld lbgt lblr lbrt lebd lede ledt leed leel leer leet lege legg lele lell lerd lere lert lete lett lgbt lgdt lger lgte lldb llet llll lrdd lrdg lrgb lrrr ltbl ltee ltge lttr rbbb rbbr rble rder rebb rebe redd rede redl redr reeb reed reel reet regd rege regl regr regt relb reld rele rell relt rerd rere rerg rert retd rete retr rett rgbe rgtr rldt rlee rred rrle rrrr rtdt rtee rtle rtlt tbrb tddb tedd tede teed teel teer teet tegg tegt tel- teld tele telg tell telt ter- tere terr tete tetr tett tgel tgle tldr tre- tred tree treg tret trge trte trtr ttbb tter tttt

-tree b-e-d bbbee bd-re be-er bebed bebel beber bedde bedee bedel beder bedet bedle beebe beede beeld beele beerd beete begee beget begge begle belde beled belee beleg belet belge bellb belle berbe berde bered bereg berel beret berge berle berre berte betee betel beter betle betre bett- bette bledd blede bleed bleer bleet blere blete bredd brede bredt breed breel breer breet breg- brege bregg brell brerd brere brett brrrr btr-d btr-t bttld dbtel ddddd debed debel deber debet deble debte dedde dedee deder deede deele deere degel degre deled delee deleg delle derbe derde dered dereg derge derre deter detre dette drdre dredd drede dredg dreed dreel drelb drell drere e-dee ebbed ebber ebbet ebble ebell eberg eberl ebert edder eddre edell edere edged edgel edger edler edred eeeee eelde eeled eeler eerde egede egged egger egret elded eldee elder eleet elele elge elgee elger ellel eller ellet erbbe erber erdre erede erege erere erred erte ertel erter etete etree ettel etter ettle gberg gebel geber gebet gebre gedeb geder gedge gedre geere geert geete gegge gelee geler gelle gerbe gerd- gerde gerdt gerle gerre gertt getee geter gette glebe glede gleed gleer gleet glegg glele glere glete glett grddl grebe grede greed greer greet grege gregg grell grete gretl grett grrrl grrrr lebed lebel leber lebet ledee leder ledet ledge leede leell leere leert leged leger legge lelle lered lerer lerge letbe letre lette llerg rdllr rebbe rebeg rebel reber rebet redbd redde redel reder reede reege reere regel reger reget regge regle regtl regtt reled relee relet relte rerde rere- reree reret reted retee retel reter retrg rette tbtbt teber tebet teder tedge teege teeld teele teell teerd tegel tegre telde tele- teleg teler tell- telle teret terge terre tert- tetel teter tetle tetr- tette tlell tlett tllbr treed treer treet treg- trele trere trete trett ttttt

b-reel b-tree bbbbbb bdell- bedded beddel bedder bedebt bedele bedell bedrel beebee beedee beedle beegee beelde beeler beerde beeter beetle begele begged begger belber belder belett belled beller bellet belted beltel belter beltre berbee berber berede bereel bereet berege berere bergel berger