-er -up b-p b-u bbb bbe bbp bbr bbt bbu be- beb bee bep ber bet beu bpb bpe bpp bpr bpt bpu brb bre brp brr brt bru btb bte btp btr btt btu bub bue bup bur but buu ebb ebe ebp ebr ebt ebu eeb eee eep eer eet ep- epb epe epp epr ept epu erb ere erp err ert eru etb ete etp etr ett etu eu- eub eue eup eur eut p-p pbb pbe pbp pbr pbt pbu peb pee pep per pet peu ppb ppe ppp ppr ppt ppu prb pre prp prr prt pru pt- ptb pte ptp ptr ptt ptu pub pue pup pur put puu rbb rbe rbp rbr rbt rbu re- reb ree rep rer ret reu rpb rpe rpp rpr rpt rpu rrb rrp rrr rrt rru rtb rte rtp rtr rtt rtu rub rue rup rur rut ruu tbb tbe tbp tbr tbt tbu te- teb tee tep ter tet teu tpb tpe tpp tpr tpt tpu trb tre trp trr trt tru ttb tte ttp ttr ttt ttu tub tue tup tur tut tuu ubb ube ubp ubr ubt ubu ueb uee uep uer uet up- upb upe upp upr upt upu ur- urb ure urp urr urt uru utb ute utp utr utt utu uue uur uut uuu

bbbb bbeb bbet bbpr bebb bebe beeb beep beer beet bere berr bert beru bete bett betu beur breb bree brep brer bret brrr brue brup brut btbp btrt bttb bubb bube bubu buer bueu bur- burb bure burp burr burt buru but- bute butt ebbr eber ebru ebur eeee eete eetu epee eper eppp eprb eprp epte epub erbb erbe ereb erer eret erpe erre ertu erub erur etbr etee eter etre ette ettu euer eur- eure eurt peep peer peet pepe per- pere perp perr pert peru pete petr pett peur peut pper pppp ppru pptt ppur pre- preb pree prep pret preu prtp prtr prue prut pruu pter pu-e pube pubu puer puet pueu pupe pupu pur- purb pure purp purr puru put- pute putt putu rbbb rbbr rebb rebe rebu reeb reep reet repe repp repr rept repu rere rert reru rete retr rett reue reup reut reuu rpet rrrr rtee rttp rubb rube rubp rubu ruer ruet rupe rupp rupt rure rurp ruru rute rutt rutu tbrb tbtp tebu teer teet tepe tepp tepu ter- tere terp terr teru tete tetr tett tetu teut tper tppp tppr tpte tptp tptr tput tre- tree tret treu trpe trpp trte trtr trub true trut truu ttbb tter tttt tubb tube tubr tubu tuer tuet tupe tupu turb ture turp turr turt turu tute tutt tutu u-rp ubbe uber ubet upbe uppe uppp uppu upup urbe ure- uret urre urte urup urur urut utep uter uttu uuuu

-tree bbbee be-er beber beebe beete beeut beppe beppu berbe beret berre berru berte betee beter betre bett- bette beuer beure beute brebu breer breet brere brett breu- brrrr bruer bruet brute btr-t bubbe buber buret burru burte burtt burut buter butte butut ebber ebbet ebert ebure eeeee eepee epptb epure erbbe erber erept erere errtu erte erter erupt etete etree etter eturu eurre p-rep pebre peebu peere peert peete pepee peppe pept- pepup perer peret perre perte perur petbe peter petr- petre petru pette petur peure prete prute pter- ptere ptprb ptpre ptprr ptprt ptpru puber puett pupet puppe puree purer purre purte puter putre putt- putte puttu putup re-up rebbe reber rebet rebut reepe reere repet reppe reprt repub reput rere- reree reret retee reter rette reuer reuet reute rubee ruber rubup ruere ruete rupee ruper ruter rutte ruutu tbtbt tbutt teber tebet teepe teeup tepee tepet tepeu teppu teret tereu terre tert- teter tetr- tette treer treet trepp trept trere trete trett treut trubu truer trupt trute ttttt tuber tupee turbe turbt turet turre turtu turup turut tutee tutte tuuru uber- upeet upper upput upter urter urubu urupe urutu uter- utter uttur utube uturu uuuuu

b-tree bbbbbb beebee beeper beeter berbee berber bereet berere berrer berret bertre berube betere betete betrue bettee better betutu beurre breere brette breuer brubru bruree bubber bububu burbet burbur burpee burper burree burrer burret burrup burutu butere butter ebbert eburru eebree erbree errett ettutu eutere pberet pebete peepee peeper peerer peeter peetre pepper perere peretu perper perpet perree perret perter pertre peteet peteru petree petrer petter pettet pppppp preeue prepub preter pretre prette preue- pruett pubber puerer puppet pupput purete purpre purpur purree purrer put-up putput putrer puttee putter puttur puture r-tree rebute reeper repete repper repure repuru repute reteer reteet retere retree retret retter rettur retube returu reuere reuter reutte rub-up rubbee rubber rubutu rupert rurutu ruttee rutter rutube t-tree t-tube teebee teepee teerpu teetee teeter tepper terete terper terrer terret terter tertre tetete tetter trebur treete treppe tretee trette truett trueup tubber tuppee tupper turbet turret turtur tururu tuteur tutter tuttut u-tube up-put ureter urette uruppu uteute

bbbbbbb bebeeru beetree berbere berrett bertree brupper brutter burbure burette erupter euterpe pee-pee peretre pereute perrett perturb prepere prepper prerept prerupt preter- pruter pubpeer puerper purpure put-put reperte repreue reteere reterre retrete rettert reutter ruppert rupture ruputer tebbutt terere terreer terrere tettete treetee trepett trettre true-up truebut turbett tut-tut ub-tree ureterp utterer

bbbbbbbb bebetter bebutter bee-butt beepbeep bepepper berebere berepper betterer bruterer bubertre bur-tree buruburu etbetter peeppeep pepperer pepperet perpetre perrerer peutetre pubertet putterer puttputt rebutter teruteru

beebeebee butterbur ettubrute pepper-up perturber peut-etre puppeteer putt-putt putter-up tebe-tebe up-putter

berberburr betterbeer butterbeer pepperette peppertree peterpeter rubbertree

ettutubrute pepper-tree pepperupper ueberreuter

pepper-upper

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