zebe zebu zees zeff zerf zert zest zete zeus zeze zrze zsss ztst zubr zubu zuft zurb zurf zurr zuru zust zuzu zzzs zzzz

-tree bbbee bbser bbuss be-er beber bebes beebe beebs beefs beeft beers beest beete beets beeut beez beffe befur berbe beres beret berre berru berse berte berts berus berze besee beset besse beste bests besut betee beter betes betre betrs bett- bette betts betus beuer beure beust beute bezer bezes brebu breef breer brees breet brere brers brese bress brest brets brett bretz breu- breze brrrr bruer brues bruet bruff bruse bruss brust brute bruzz bsure btr-t btrfs btstu bubbe buber bufet buffe buffs burbs bures buret burrs burru burse burst bursz burte burts burtt burus burut buser buses busse bussu buste busts busur busut busuu buter butes butte butts butut buzet buzzr bzzzt ebber ebbet ebers ebert ebure eeeee ef-ts ef-tu efere efetf effer effet effts efter efuru efuse efutu erbbe erber erebs erere erest erets eretz erres errtu erses erste ersts erte erter ertes erubs eruts esbus esere esref esser esses essse essue estee ester estes estet estre estur estus esure etest etete etree etres etter ettes eturu eurre eurus euser euzet febre feebs feere feers feese feets feeze feres feret ferr- ferre ferse ferte ferus feser fesse fest- feste fests festu feter fetes fette fetus feuer feurs feute fezes freer frees freet frere frese fress frest frets frett freur frust frute frutz ftest ftrtt fu-fu fubbs fubus fuest fuffs furrs furse furst furus furze fusee fuser fuses fusse fuste fusts fusus futsu futur fuuse fuzee fuzer fuzes fuzze fzbrf rebbe reber rebet rebts rebus rebut reefe reefs reeft reere reese reest reetz reeze refer refet reffe refts refus refut rere- reree reres reret rerez resee reses reset resse reste restr rests resue resus retee reter retes retsu rette retts reuer reuet reuse reuss reute reuze rezes rsssf rsust rubee ruber rubes rubus ruere ruers ruete ruetz ruffe ruffs rufus ruses russe ruste rusts rustu ruter rutte ruutu s-bus sebbe sebes sebet seebe seere seers seese seest seesu seete sefer sefes seffe sefte serbs seref serer seres seret serez serfe serff serfs serre serse serss sert- serte serts serue serut seser seses sesse seste sestu sesue setee seter setse setsf sette setts settu setus setut setzu seuer seure seuss seute sezer sezze sfruz sssrb sssss steer stees steet steff stere sterr sters stert stesu stete stets steur strbe streb stree stret streu strez strrs strub strue strut sttrz stube stubs stuer stufe stuff stuft sturb sture sturt stuse stuss stute stutz stuue subbu suber subss subst suere suers suess suest suete suets sueur sufes suffe suffr suffs suftu surer sures surfs surre surte surtr surur surus suser suses susse susus susuz sutee suter sutes sutte suttu sutzu suzue tbtbt tbutt teber tebet teebs teers teese teest teets tefe teffs teres teret tereu terre terrs terse tert- tesse teste tests teter tetes tetr- tetsu tette teuts treer trees treet trefe treff trefs trere tres- trese tress trest trete trets trett treus treut trubs trubu truer trues truff truse truss trust trute truus tsebe tsere tsets tsuru tsuur ttest ttttt ttusb tubbs tuber tubes tuffe tuffs tufte tufts turbe turbt turet turfs turre turse turss turst tursu turtu turut turze tutee tutte tutus tuuru tzere tzute uber- ubers ubrez uetze ufere ufeus urbes ursus urter urubu urutu urzut usees users usest usses uster ustur usure usutu uter- utfse utfsf utter uttur utube uturu uuuuu uzere uzes z-ter zbure zebre zebub zebus zeese zerbe zerre zeste zests zetes zeuet zeuss zfeet zrbtt zu-zu zuber zubrs zufre zurs zuzes zzzzz

b-tree bbbbbb bbsers beebee beebes beefer beerse beerst beerze beeste beeter beezer beezus beffes befree befret berbee berber berbes bereet bereft berere berest berets berrer berres berret bersee berset bertes bertre bertus berube berust besbes besbre besert besets besser besses besset bessus bester besure betere betete betrue bettee better bettes betutu betzet beurre beuste brebes breefe breere breese breest breeze breres bresse breste brests brette bretts breuer breust brubru brufut bruree brusse bruste brutes brutus brzuze bs-tbs bubber bubbes bububu bueres buetts buffer buffet burbet burbur burets burfee burree burrer burret burser burses burseu bursts bursut burutu burzet busbee busser busses busset bustee buster butere butter buttes bututs butzer buzzer buzzes ebbers ebbert ebbest ebbets eberts eburru ebusus eebree effere effete effuse effutu efreet efter- efters erbree erebus erestu eresus eretes erfurt errest errett erster ersure eseebu essebt essert essess esssse essure estees esters estree estres estrus estter esttes esture eszett eszter etrez ettutu eusebe eutere f-test febres feeres feeses ferber ferez ferfer ferrer ferres ferret ferrez ferrur ferrus fertee ferter fesere fesser fesses fester festue festus fetter fettes feture fetzer feuter fezzes freeez freers freese freest freeze frefre freres fresse fresst frette fretts freure fruste fterer fterre fuerse fuerst fuerte furber furfur furrer furres furrfu furzes fusees fusers fusser fusses fuster fustet fusure futret futter futtsu future futzes fuzzes r-tree re-use rebbes rebets rebuff rebusz rebute rebuts reefer reeffe reeser reeses reests refeet refeff refers refert refete reffus refret refter refurb refuse refute rerees resees resets rester restes restez restte resues reteer retees reteet retere retest retree retret retter rettur retube returf returu retuse reuere reuser reuses reuter reutte rezzes rreuse rubbee rubber rubeus rubutu rufete ruffer ruffes ruffet ruffus rufter rurutu rusetu russer russes russet russus rustre ruttee rutter rutube sebesu sebete sebree sebrus sebseb see-er seesee serefe serere serers serest sereus serre- serres serret seruse sesser sesses sessue sester sestet sestre sestus sesube setees seters setfee settee setter settsu settur setzer seurre seurte sssfrs steber stebus steere steers stere- sterer steres sterre sterte steure steutz street stress strete strube struer struse strust struts strutt stubbe stubbs stuber stubes stufer stuffe stuffs stufre sturre sturts sturtz stutte suberb subers subfeu subset suburb subzee suebee suerte sueter suetes sufers suffer suffes suffet surbet surest surete surfer sursee surses surtur surzur suserz susses suster sustre susure susurr suttee sutter suture t-test t-tree t-tube tbtest teebee teebus teerts teests