nuer nuke nuku nune nunk nunn nunt nupe nure nurn nurp nurr nurt nuru nute nutt nutu nuuk pbpk peek peen peep peer peet peke pekk pen- pene penk penn pent penu pepe per- pere perk pern perp perr pert peru pete petn petr pett peun peur peut pnet pneu pnkp pnpp pntr pnup ppen pper pppn pppp ppru pptn pptt ppur pre- preb pree prek pren prep pret preu prnp prtp prtr prue prut pruu pten pter pttk pu-e pube pubu puer puet pueu puke puku pune punk punt punu pupe pupu pur- purb pure purp purr puru put- pute putt putu rbbb rbbr rebb rebe rebk rebu reeb reek reen reep reet reke rekt rene renk renn rent renu repe repp repr rept repu rere rert reru rete retr rett reue reuk reup reut reuu rnbr rnnt rntp rnut rpet rppn rptn rrrr rrun rtee rtkn rttp rubb rube rubp rubu ruen ruer ruet ruke rukk rukn ruku rune runk runn runt rupe rupp rupt rure rurp ruru rute rutt rutu ruun tbrb tbtp tebu teek teen teer teet teke tenb tene tenk tenn tenp tent tenu tepe tepp tepu ter- tere terk tern terp terr teru tete tetr tett tetu teuk teut tneb tnpk tnut tper tpke tppp tppr tpte tptp tptr tput tre- tree trek tren tret treu trpe trpn trpp trte trtr trub true truk trun trut truu ttbb tten tter tttt tubb tube tubr tubu tuen tuer tuet tuke tunb tune tunk tunn tunu tupe tupu turb ture turk turn turp turr turt turu tute tutt tutu u-rp ubbe ubek uber ubet ukek ukeu ukup ukur unbe uneb unee unen uner unke unkn unne untb unte unut upbe upen upne upnp uppe uppp uppu upup urbe ure- uret urke urne urre urte uruk urun urup urur urut utep uter utne uttu uuen uuuu

-tree b-r-k bbbee be-er bebek beber beebe beeke beene beete beeut beken beker bekke bene- benet benke benne bennu benue benuk benun benur benut bepen beppe beppu berbe berek beren beret berk- berke berne bernt berre berru berte berun betee beten beter betke betne betre bett- bette beuer beure beute bpeen brebu breek breen breer breet breke brene brenk brenn brent brere brett breu- brrrr bruen bruer bruet bruke brune brunk brunn brunt brute bruun btr-t bubbe buben buber buker buket bukk- buknu bunke bunne bunte bunuk bunun bunut burek buren buret burke burn- burne burnt burru burte burtt buruk burun burut buten buter butke butte butut e-ten ebber ebbet ebene ebern ebert ebner ebure eeeee eener eenet eepee eeten ekene ekker ekren ekuku ekuru enbun enent enete enker enku ennet enper enpeu enrut enten enter entre enure enurn epeen epene epptb epuku epure erbbe erben erber ereen erept erere ernen ernet errtu erte erter ertun eruke erupt eteke etern etete etnre etree etrek etrun etten etter eturu eunet eupen eurre k-p-r k-t-b k-ute kebbe kebek keben keber keene keepe keere kenet kenku kenne kente keppe kerek keren kerep keret kerne kernu kerre kertu ketek keten keter kette kneen kneep knepp knete knurr knute krbpe kreek kreep kreke krenn krepe krete kreuk krunk krupp kruun kubek kuben kuber kukup kukur kunek kunen kuner kunku kunne kunur kupen kuper kuppe kupur kurbu kurek kuren kurku kurne kurre kurte kuruk kurup kutte kuttu kutur n-p-n nebek neber nebet nebpu nebtu neere neetu neker nente neper neppe nepte neree neret nerre nerte nerur neten netne nette neuen neuer neueu neune neur- neure nkubu nnebe ntete nu-nu nuker nunet nunun nupen nupur nure- nurek nuruk nurun nutte nutuk p-n-p p-rep pebre peebu peeke peene peent peere peert peete peket pekre pene- pener penne penre pent- pente pentu penup penur pepee peppe pept- pepup peren perer peret perke perne pernt perre perte perun perur petbe peter petr- petre petru pette petun petur peure pptnt pre-k preen preke prene prenk prent prepn prete preuk prnek prntr pruen prun- prune prunt prute pter- ptere ptprb ptpre ptprk ptprn ptprr ptprt ptpru puber puett puker punbb punee punkt punne punte punuk pupet puppe puree puren purer purku purre purte puten puter putre putt- putte puttu putun putup re-up rebbe reber rebet rebun rebut reene reepe reere reken rekke rekne rekun renbp renee rener renet renke renku renne rente repen repet reppe reprt repub repun reput rere- reree reret rerun retee reter retnr rette reuen reuer reuet reune reute rnpep rt-rk rtenn rubee ruben ruber rubke rubup ruere ruete rueun ruken rukke runer runet runne runte runup rupee ruper ruten ruter rutte ruutu t-nut tbtbt tbutt teber tebet tebuk teepe teeup teken teket tekke tekn- ten-k tenen tener tenet teneu tenke tenne tennu tenpn tente tenue tenup tenur tepee tepet tepeu tepke teppu tepun terek teret tereu terne terre tert- teten teter tetr- tette tntnt trbuk treen treer treet trene trent trepp trept trere trete trett treut trubu truer truke trunk trupt trute ttnet ttttt tubek tuber tuene tukne tukur tune- tuner tunku tunne tupee tupek turbe turbt turek turen turet turku turn- turne turnp turnt turnu turre turtu turup turut tutee tutku tutte tutun tuuru ubeen uber- ueken ukeep ukeke ukert unbet unerp unete unken unker unket unkur unnet unnun unnur unnut unpen unpeu unput unrep unrun unten unter unurn upeet upenn uppen upper upput uprun upter urent urker urkun urkut urpek urter urubu urupe urutu utenn uter- utter uttur utube uturn uturu uunet uuuuu

b-tree bbbbbb beebee beeker beeper beerne beeter bekenu bekker benben benete benett benken benner bennet bennur benreu bentee benter benupe berbee berber bereet bereke berene berere berken berker berkut berner bernet berrer berret bertre berube betere betete betrue bettee betten better betune beturn betutu beuren beurre breere brekke brener brenne brette breuer brubru bruern bruker bruket bruner brunet brunke brunne bruree bubber bububu buepen buerne bukett bukkur bukuru bunker bunnet bunter burbet burbur burket burkut burn-e burner burnet burnuk burnup burnut burpee burper burree burren burrer burret burrup buruku burutu butene butere butner butnet butten butter ebbert eburru eebree ekeren ektene enbene enkuru ennepe