urbs ure- ures uret urge urgu urre urse urss ursu urte urts urur urus urut usbe usbr usbs usee user uses uset ussb usse ussr usss usst ussu ustb uste usts usus uter utes uttu utug uuuu

-tree bbbee bbser bbuss be-er beber bebes beebe beebs beers beest beete beets beeut begee beget begge beggs begue begur begut bejte berbe bereg beres beret berge bergs berre berru berse berte berts berus besee beset besse beste bests besut betee beter betes betre betrs bett- bette betts betus beuer beure beust beute brebu breer brees breet breg- brege bregg brere brers brese bress brest brets brett breu- brrrr bruer brues bruet bruge brugg bruse bruss brust brute bsure btr-t btstu bubbe buber buger buges bugge bugre bujru burbs bures buret burge burgs burgu burrs burru burse burst burte burts burtt burus burut buser buses busse bussu buste busts busur busut busuu buter butes butte butts butut ebber ebbet eberg ebers ebert ebure eeeee egers egest egeus egger egres egret ejure erbbe erber erebs erege erere erest erets erres errtu erses erste ersts erte erter ertes ertug erubs eruts esbus esere esser esses essse essue estee ester estes estet estre estur estus esure etest etete etree etres etter ettes eturu euges eujet eurre eurus euser gberg gberu geber gebet gebre gebur geere geers geert geese geest geete gegge gerbe gerbs geres gerre gers- gerse gerss gerts gertt geser gesse geste gests getee geter gette getts grebe greer grees greet grege gregg gregs grese gress grest grete grett greut grgur grrrr grubb grube grubs grues grure gruse gruss grust gruts gruut gsses gtsss gtube gubbe guber gubru guere guess guest gurge gurre gurse gursu gurts gurur gurus guste gusts gustu gutte j-bus jebet jebus jeers jeetu jejur jerre jerte jesse jests jesus jetee jeter jetes jette jetut jeure jeuse jeuss jeust jtest ju-ju jubbe jubeb jubes jubet jubur jubus jueju juger jugge juggs jujus juste justs juter jutes jutsu juuru rebbe rebeg reber rebet rebts rebus rebut reege reere reese reest reger reges reget regge regts regtt regur regus regut rere- reree reres reret resee reses reset resse reste restr rests resue resus retee reter retes retje retrg retsu rette retts reuer reuet reuse reuss reute rsust rtejr rubee ruber rubes rubus ruegg ruere ruers ruete ruger ruget rugge ruses russe ruste rusts rustu ruter rutte ruutu s-bus sebbe sebes sebet seebe seege seere seers seese seest seesu seete segeg seger seget segge segre segrt segtb segub segue segur segus serbs serej serer seres seret serge sergs sergt serjt serre serse serss sert- serte serts serue serug serut seser seses sesse seste sestu sesue setee seter setse sette setts settu setus setut seuer seuge seure seuss seute ss-gb ssgts sssrb sssss steeg steer stees steet steg- stege stegs stere sterr sters stert stesu stete stets steur stger stges strbe streb stree stret streu strrs strub strue strug strut stube stubs stuer sturb sture sturt stuse stuss stute stuue subbu suber subss subst suere suers suess suest suete suets sueur suger suget sugge suggs sugru sugus sugut sujee sujet surer sures surge surgu surju surre surte surtr suruj surur surus suser suses susje susse susus sutee suter sutes sutte suttu tbtbt tbutt teber tebet teebs teege teers teese teest teets teges tegre tegur tegus tejus teres teret tereu terge tergu terje terre terrs terse tert- tesse teste tests teter tetes tetr- tetsu tette teuge teuts tjebu tjust treer trees treet treg- trere tres- trese tress trest trete trets trett treus treut trubs trubu truer trues trugg trugs truse truss trust trute truus tsebe tsere tsets tsgts tsuge tsuru tsuur ttest ttttt ttusb tubbs tuber tubes turbe turbt turet turje turju turre turse turss turst tursu turtu turut tutee tutte tutus tuuru uber- ubers ugrug ujue urbes urger urges urgut ursus urter urubu urutu usbeg usees users usest usses uster ustje ustur usure usutu uter- utter uttur utube uturu uuuuu

b-tree bbbbbb bbsers beebee beebes beebug beegee beerse beerst beeste beeter begess begets begger begtse begues bejjur berbee berber berbes bereet berege berere berest berets berger berrer berres berret bersee berset bertes bertre bertus berube berust besbes besbre besege besert besets besser besses besset bessus bester besuge besure betere betete betrue bettee better bettes betutu beurre beuste bjerre brebes breege breere breese breest breger bregge breres bresje bresse breste brests brette bretts breuer breust brubru bruges brugge bruree brusje brusse bruste brutes brutus bs-tbs bubber bubbes bububu bueres buetts bugbug bugger bugget burbet burbur burets burgee burger burges burgus burree burrer burret burser burses burseu bursts bursut burutu busbee busser busses busset bustee buster butere butter buttes bututs ebbers ebbert ebbest ebbets eberts eburru ebusus eebree egbere egbert egbesu egests eggers eggert egjert egress egrets erbree erebus erestu eresus eretes ergste errest errett erster ersure eseebu esgrus essebt essert essess essgee esssse essure estees esters estree estreg estres estrus estter esttes esture etgert ettutu eusebe eutere g-test g-tube gbegbe gebbet gebert geburs geegee geerts geeste geests gegger gerber gerbes gerege gereut gerger gerges gerres gerret gerrus gertte gertus geruge gesbte gesees gesser gester gestes gestur gestus getrse getset getter geurts gjergj grebes greers greese greest greete greets greger greges gregge greggs gregre gresse greter grette grubbe grubbs gruber grugru grusse gteter gubber gubeer gubgub gueber guebre guegue guerre guesse guesss guests guetre gurbru gurges gurses gurugu gusgus gusset guster gutser gutses guttee gutter guttur guttus j-test jebbet jeerer jegget jesses jessur jestee jester jetset jettee jetter jettru jeurre ju-jus jubbes jubbet jubett jubjub jugers jugger jujube jurere juster justes justus r-tree re-use rebbes rebegs rebets rebute rebuts reeser reeses reests regess regest regret regueb rerees resees resets rester restes restte resues reteer retees reteet retere retest retree retret retter rettur retube returu retuse reuere reurge reuser reuses reuter reutje reutte rreuse rubbee rubber rubeus rubutu rugetu rugger rurutu rusetu russer russes russet russus rustre rutger ruttee rutter rutube seberg sebesu sebete sebree sebrus sebseb see-er seeger seerge seesee segers segert segger segreg segres seguer segues serere