-er -up b-p b-u bbb bbe bbi bbp bbr bbt bbu be- beb bee bei bep ber bet beu bi- bib bie bii bip bir bit biu bpb bpe bpi bpp bpr bpt bpu brb bre bri brp brr brt bru btb bte bti btp btr btt btu bub bue bui bup bur but buu ebb ebe ebi ebp ebr ebt ebu eeb eee eep eer eet eib eie eii eip eir eit eiu ep- epb epe epi epp epr ept epu erb ere eri erp err ert eru etb ete eti etp etr ett etu eu- eub eue eui eup eur eut ibb ibe ibi ibp ibr ibt ibu ie- iee iei iep ier iet iib iie iii iip iir iit iiu ipb ipe ipi ipp ipr ipt ipu ir- irb ire iri irp irr irt iru itb ite iti itp itt itu iu- iub iue iui iup iur iut p-p pbb pbe pbi pbp pbr pbt pbu peb pee pei pep per pet peu pib pie pii pip pir pit piu ppb ppe ppi ppp ppr ppt ppu prb pre pri prp prr prt pru pt- ptb pte pti ptp ptr ptt ptu pub pue pui pup pur put puu rbb rbe rbi rbp rbr rbt rbu re- reb ree rei rep rer ret reu rib rie rii rip rir rit rpb rpe rpi rpp rpr rpt rpu rrb rri rrp rrr rrt rru rtb rte rti rtp rtr rtt rtu rub rue rui rup rur rut ruu tbb tbe tbi tbp tbr tbt tbu te- teb tee tei tep ter tet teu tib tie tii tip tir tit tiu tpb tpe tpi tpp tpr tpt tpu trb tre tri trp trr trt tru ttb tte tti ttp ttr ttt ttu tub tue tui tup tur tut tuu ubb ube ubi ubp ubr ubt ubu ueb uee uei uep uer uet uib uie uii uip uir uit uiu up- upb upe upi upp upr upt upu ur- urb ure uri urp urr urt uru utb ute uti utp utr utt utu uue uur uut uuu

bbbb bbeb bbet bbpr bebb bebe bebi beeb beep beer beet beir beit bere beri berr bert beru bete beti bett betu beur bibb bibe bibi bieb bier biet bieu bipp bipu birb bire biri birr birt biru bite bitt bitu bpti breb bree brei brep brer bret brie brit brrr brue brup brut btbp btie btrt bttb bubb bube bubi bubu buer bueu buie buir buit buiu bur- burb bure buri burp burr burt buru but- bute buti butt ebbr eber ebit ebru ebur eeee eete eetu eiei eier eipr eire eitb eiti eitr epee eper epi- epie epip epit eppp eprb eprp epte epub erbb erbe ereb erei erer eret erie erit eriu erpe erre ertu erub erur etbr etee eter etre ette etti ettu etui eubi euer eur- eure eurt i-be ibet ibie ibri ibtb ieet ieie iere ieri iett iiie iiii iiit iitr iitt iper ipet ipie ippr ipri ipur iput irbe irbp iree irer iri- irie irip irpe irre irri irte irti irtp itbe itep iter itet itie itri itup itur iuiu iupp peep peer peet peip peir peit pepe pepi per- pere peri perp perr pert peru pete peti petr pett peur peut pibb pibi piep pier piet piip pipe pipi pipp pire piri pirr piru pite piti pitr pitt pitu pper ppib ppie pppp ppru pptt ppur pre- preb pree prep pret preu pri- prie prii prri prti prtp prtr prue prut pruu pter ptui pu-e pube pubu puer puet pueu puir puit puiu pupe pupi pupu pur- purb pure puri purp purr puru put- pute puti putt putu rbbb rbbr rebb rebe rebu reeb reep reet reii reir reit reiu repe repi repp repr rept repu rere reri rert reru rete reti retr rett reue reup reut reuu rib- ribe ribu riep rier riet rieu ripe ripi ripp ripr ript rire riri rite riti ritt ritu riue rpet rpii rrrr rtee rtei rttp rubb rube rubi rubp rubu ruer ruet ruit rupe rupp rupt rure ruri rurp ruru rute ruti rutt rutu tbit tbrb tbtp tebu teer teet teie teip teir teiu tepe tepi tepp tepu ter- tere teri terp terr teru tete teti tetr tett tetu teut tibi tibu tie- tiee tiei tiep tier tiet tiit tiiu tip- tipe tipi tipp tipt tipu tirb tire tiri tirr tiru tite titi titp titt titu tper tpir tppp tppr tpte tptp tptr tput tre- tree trei tret treu tri- trib trie trip trit trpe trpp trte trtr trub true trut truu ttbb tter tttt tubb tube tubr tubu tuei tuer tuet tuit tuiu tupe tupi tupu turb ture turi turp turr turt turu tute tuti tutt tutu u-ie u-rp ubbe ubbi uber ubet ubii ubir ubit ueir uepi uipi uirr upbe upie uppe uppp uppu upri upup urbe urbi ure- uret urib urie uriu urre urri urte urup urur urut utep uter utri utti uttu uuri uuuu

-tree bbbee be-er beber bebti beebe beepi beeri beete beeut beibi beier beipu beire beite beppe beppu berbe berei beret berie berit beriu berre berri berru berte berti betee beter betie betre bett- bette betti beuer beure beute bibbe biber bibie bibri biebe biere bieri biert bieti bieup bipib birie birur biter bitit bitru bitte bitti bitup biure brebu breer breet breit brere brett breu- bribe brier brite britt brrrr bruer bruet bruit bruiu bruri brute btr-t bubbe buber buipe buire buret burie burri burru burte burtt burut buter butit butte butut ebber ebbet ebbie ebert ebibe ebure eeeee eepee eerie eetti eipri eirie eiter eitri eppie epptb epure erbbe erber erept erere erier erite eritu errtu erte erter erupt etete etite etree etter ettie eturu eubie eurre i-bet ibbur ibert ibeti iebet ieiri iepe ieper ierei iette iiiee iiiii iitti iperu ipeti ipiti ippee ippei ipubi irbit irete irite irrep irrit irupi itbit itete itire itrip itter ittre ittti itu-r itu-t ituri ituru itutu iuput iurie p-rep pebi-