-er -up b-p b-u bbb bbe bbn bbp bbr bbt bbu be- beb bee ben bep ber bet beu bnb bne bnn bnp bnr bnt bnu bpb bpe bpn bpp bpr bpt bpu brb bre brn brp brr brt bru btb bte btn btp btr btt btu bub bue bun bup bur but buu ebb ebe ebn ebp ebr ebt ebu eeb eee een eep eer eet en- enb ene enn enp enr ent enu ep- epb epe epn epp epr ept epu erb ere ern erp err ert eru etb ete etn etp etr ett etu eu- eub eue eun eup eur eut nbb nbe nbn nbp nbr nbt nbu ne- neb nee nen nep ner net neu nnb nne nnn nnp nnt nnu npb npe npn npp npr npt npu nrb nre nrn nrp nrr nrt nru ntb nte ntn ntp ntr ntt ntu nub nue nun nup nur nut nuu p-p pbb pbe pbn pbp pbr pbt pbu peb pee pen pep per pet peu pn- pnb pne pnn pnp pnr pnt pnu ppb ppe ppn ppp ppr ppt ppu prb pre prn prp prr prt pru pt- ptb pte ptn ptp ptr ptt ptu pub pue pun pup pur put puu rbb rbe rbn rbp rbr rbt rbu re- reb ree ren rep rer ret reu rnb rnn rnp rnr rnt rnu rpb rpe rpn rpp rpr rpt rpu rrb rrn rrp rrr rrt rru rtb rte rtn rtp rtr rtt rtu rub rue run rup rur rut ruu tbb tbe tbn tbp tbr tbt tbu te- teb tee ten tep ter tet teu tnb tne tnn tnp tnr tnt tpb tpe tpn tpp tpr tpt tpu trb tre trn trp trr trt tru ttb tte ttn ttp ttr ttt ttu tub tue tun tup tur tut tuu ubb ube ubn ubp ubr ubt ubu ueb uee uen uep uer uet un- unb une unn unp unr unt unu up- upb upe upn upp upr upt upu ur- urb ure urn urp urr urt uru utb ute utn utp utr utt utu uue uun uur uut uuu

-ene bbbb bbeb bbet bbpr bebb bebe beeb been beep beer beet bene benn bent benu bere bern berr bert beru bete bett betu beur bner bnet bnpp bnrr breb bree bren brep brer bret brrr brue brun brup brut btbp bten btrt bttb bubb bube bubu buen buer bueu bunb bune bunn bunt bunu bur- burb bure burn burp burr burt buru but- bute butt ebbr eben eber ebru ebur eeee eent eete eetu enb- enbn enbr enee ener enne ennu enp- ent- ente entp entr enue enur enut epee epen eper eppp eprb eprp epte epub erbb erbe ereb eren erer eret erne erpe erre ertu erub erur etbr etee eten eter etne etnr etre ette ettn ettu etun euer eur- eure eurt n-up nber nbpp nebb nebe nebn nebr nebu neeb neen neep neer neet nene nent nenu nepe nepr nept nere nerr nert neru net- netb nete nett neue neun neur neut neuu nnnn nnpr nntn nprt npte nptn nren nrpn nter nteu ntnu ntru nttr nube nuee nuer nune nunn nunt nupe nure nurn nurp nurr nurt nuru nute nutt nutu peen peep peer peet pen- pene penn pent penu pepe per- pere pern perp perr pert peru pete petn petr pett peun peur peut pnet pneu pnpp pntr pnup ppen pper pppn pppp ppru pptn pptt ppur pre- preb pree pren prep pret preu prnp prtp prtr prue prut pruu pten pter pu-e pube pubu puer puet pueu pune punt punu pupe pupu pur- purb pure purp purr puru put- pute putt putu rbbb rbbr rebb rebe rebu reeb reen reep reet rene renn rent renu repe repp repr rept repu rere rert reru rete retr rett reue reup reut reuu rnbr rnnt rntp rnut rpet rppn rptn rrrr rrun rtee rttp rubb rube rubp rubu ruen ruer ruet rune runn runt rupe rupp rupt rure rurp ruru rute rutt rutu ruun tbrb tbtp tebu teen teer teet tenb tene tenn tenp tent tenu tepe tepp tepu ter- tere tern terp terr teru tete tetr tett tetu teut tneb tnut tper tppp tppr tpte tptp tptr tput tre- tree tren tret treu trpe trpn trpp trte trtr trub true trun trut truu ttbb tten tter tttt tubb tube tubr tubu tuen tuer tuet tunb tune tunn tunu tupe tupu turb ture turn turp turr turt turu tute tutt tutu u-rp ubbe uber ubet unbe uneb unee unen uner unne untb unte unut upbe upen upne upnp uppe uppp uppu upup urbe ure- uret urne urre urte urun urup urur urut utep uter utne uttu uuen uuuu

-tree bbbee be-er beber beebe beene beete beeut bene- benet benne bennu benue benun benur benut bepen beppe beppu berbe beren beret berne bernt berre berru berte berun betee beten beter betne betre bett- bette beuer beure beute bpeen brebu breen breer breet brene brenn brent brere brett breu- brrrr bruen bruer bruet brune brunn brunt brute bruun btr-t bubbe buben buber bunne bunte bunun bunut buren buret burn- burne burnt burru burte burtt burun burut buten buter butte butut e-ten ebber ebbet ebene ebern ebert ebner ebure eeeee eener eenet eepee eeten enbun enent enete ennet enper enpeu enrut enten enter entre enure enurn epeen epene epptb epure erbbe erben erber ereen erept erere ernen ernet errtu erte erter ertun erupt etern etete etnre etree etrun etten etter eturu eunet eupen eurre n-p-n neber nebet nebpu nebtu neere neetu nente neper neppe nepte neree neret nerre nerte nerur neten netne nette neuen neuer neueu neune neur- neure nnebe ntete nu-nu nunet nunun nupen nupur nure- nurun nutte p-n-p p-rep pebre peebu peene peent peere peert peete pene- pener penne penre pent- pente pentu penup penur pepee peppe pept- pepup peren perer peret perne pernt perre perte perun perur petbe peter petr- petre petru pette petun petur peure pptnt preen prene prent prepn prete prntr pruen prun-