poot pop- pope popo popp popt porb pore porg poro porr port potd pote poto pott pper ppod pppd pppo pppp pptt pre- preb pred pree preg prep pret pro- prob prod proe prog proo prop prot prpd prrd prtp prtr pter ptop ptpd ptrd rbbb rbbr rdbp rder rebb rebe rebo redd rede redo redr reeb reed reep reet regd rege rego regr regt reod reog reop reot repe repo repp repr rept rerd rere rerg rero rert retd rete reto retr rett rgbe rgtr rob- robb robe robo robt rodd rode rodo roed roeg roer roet roge rogg rogo roob rood roog roop roor root rope ropo rore roro rort rote rotg roto rotr rott rpdp rpet rpob rpoe rptd rred rrrr rtdt rtee rttp tbrb tbtp tddb tdor tebo tedd tede teed teer teet tegg tego tegt teor tepe tepp ter- tere tero terp terr tete teto tetr tett tobe tobo tobt todd tode todo todt toed toee toer toet toge togo togr togt tood toor toot top- topd tope topo topp topt tord tore torg toro torp torr tort totd tote toto totr tott tpbg tped tpeg tper tppd tppp tppr tpte tptp tptr tre- tred tree treg treo tret trge trod troe trog troo trop trot trpe trpg trpp trte trtr ttbb tteo tter ttoe ttop tttt

-tree b-e-d bbbee bd-re bdoor bdort be-er be-ro bebdo bebed beber bebod bebog bebop bebot bedde bedee beder bedet bedog bedot beebe beede beerd beete begee beget begge begob begod begor begot begto beode beord beote bepop beppe beppo berbe berde bered bereg beret berge berob beroe beror berre berte berto betee beter betoo betor betre bett- bette betto bo-bo bobet bobr bobre bodd- boded boder bodge bodoe bodog bodor boedo boege boero boger boget bogge bogoe bogor bogot boode booed booer boord boore boort bopet borbo borde bordo bored boree borer boret borge borgo boro- borod boroo borot borre borro botet botro botte bredd brede bredt breed breer breet breg- brege bregg breo- brerd brere breto brett brobo brodd brode brodo broer brood broto brrrr btr-d btr-t d-dot d-rod ddddd ddebo debed deber debet debot debro debte dedde dedee deder deede deepe deepp deere degre deore deoro depbt depoe depop depor depot derbe derde dered dereg derge dero- derob derog derpt derre derro deter detoo detre dette do-do dobee dober dobre dobro dodge dodoo dodro doerr dogbo dogge doggo doodo doore doote doped doper dopet doppe dordt dored doree doret dorge dorog dorot dorpe dorre dorte doted doter dotoo dotto drbob drdre dredd drede dredg dreed dreep drepe drere drgeo drobe drobo drode drog- drogo drood droog droop drop- drope dropo dropt drote drott e-dee e-otd e-pro ebbed ebber ebbet eberg ebert edder eddoe eddre edeo- edere edged edger edoor edott edred eeeee eeped eepee eerde egede egged egger egret eorre epode epopt epote epptb erbbe erber erdor erdre erede erege erept erere ergo- ergot erode erodr eroge eroor erore eroto erred error erte erter etete etoro etree etrog etter gberg gbpee geber gebet gebre gedeb gedeo geder gedge gedre geebo geere geert geete gegge geode geoop georg geppo gerbe gerbo gerd- gerde gerdt gerre gertt getee geter getgo gette getto go-go go-oo go-op go-to gobbe gobbo gobeo gobet gobot godbe goddo godet godor godot godre goget gogro goobo goode goodg goodo gooed googe goord goore goote goper goppe gopro gorbe gorde gordo gored goree gorer gorge gorgo gorod gorre goter gotoo gotop gotor gotto grebe grebo grede greed greer greet grege gregg grego greot grepe grepo grete grett grodd grode grodt groet groge grogg grood groop groot grope gropp grote grott grrrr gtrot o-dog o-r-b obbet obedt oberg obert obete obodo oboro obote obreb odder odebo odeto odore oeppo ogeed ogode ogogo oo-er ooooo oopod op-ed opepe opere opobo opodo opped opper opted opter opto- optot optto orbed orbot order ordet ordre ordro oredo oreed oreo- orere orero orobe orobo orodo oroer orped orret orrgo orter ortet ortoo otego otere otero ototo otpor otter p-rep pebre pedee pedo- pedot pedro peebo peege peere peert peete pepee peppe pept- pepto perde perer peret perge pergo perot perre perro perte perto petbe peter petr- petre petro pette petto pgrep po-po pobe poder podge podo- podob podoe podor poete pogge pooed pooer poope poopo poore poort poote poped poper popet popop poppe poppo poreb pored porer poret porge porgo poro- porog porro porte porto poteb poted potee poter potoo potop potor potpe potro potte potto ppdeg prede prego preop prepd prepg prete preto probe probo prodd prode prodg proer progg proor proot prop- prope propp propr propt prore prot- proto prtor pter- ptere ptero ptprb ptprd ptpre ptprg ptpro ptprr ptprt rebbe rebeg reber rebet rebop redbd redde reder redor redot reede reege reepe reere reger reget regge reggo regtt reord reorg repeg repet repop repor repot reppe repro reprt reptd rerde rere- reree reret rerob reted retee reter retgo retop retrg retro rette retto ro-ro robbe robbo robed rober robo- robop robor robot robrt robte rodbo rodde roded rodeo roder rodge rodor roero roger roget rogge roode rooer rooge roope roore roote roped roper roppe rorer roteb roted roter rotge roto- rotor rotot rotte rotto rprop rptor t-dog t-pop t-top tbtbt teber tebet teder tedge teege teepe teerd tegre teodo tepee tepet tepor teppo teret terge tergo teror terre terro tert- teter tetr- tetro tette to-be to-do to-go tobbe tobed tobeg tober tobet tobog tobor tobot tobre toder todor toego toerr toeto toged toget togge toobe toode tooed toord toore topbt toped topee toper topet topo- topog topor topot toppo toptb topto torbe torde tored toreo toret torgo torob torog torpe torpo torre torro torte torto toted toter toto- totoe totoo totop totte tprot treed treer treet treg- trego trepp trept trere trete trett trode troee trood troop trop- trope tropo trott ttttt

b-tree bbbbbb be-bop be-ode bebeto bedded bedder beddoe bedebt bedote bedrop bedtop beebee beedee beegee beeped beeper beerde beeter begged begger begogo begood begore begoro