-er -up b-p b-u bbb bbc bbe bbp bbr bbt bbu bcb bcc bce bcp bcr bct bcu be- beb bec bee bep ber bet beu bpb bpc bpe bpp bpr bpt bpu brb bre brp brr brt bru btb btc bte btp btr btt btu bub buc bue bup bur but buu c-- cbb cbc cbe cbp cbr cbt cbu ccb ccc cce ccp ccr cct ccu ce- ceb cec cee cep cer cet ceu cpb cpc cpe cpp cpr cpt cpu crb crc cre crp crr crt cru ctb ctc cte ctp ctr ctt ctu cub cuc cue cup cur cut cuu ebb ebc ebe ebp ebr ebt ebu ec- ecb ecc ece ecr ect ecu eeb eec eee eep eer eet ep- epb epc epe epp epr ept epu erb erc ere erp err ert eru etb etc ete etp etr ett etu eu- eub euc eue eup eur eut p-p pbb pbc pbe pbp pbr pbt pbu pcb pcc pce pcp pcr pct pcu peb pec pee pep per pet peu ppb ppc ppe ppp ppr ppt ppu prb prc pre prp prr prt pru pt- ptb ptc pte ptp ptr ptt ptu pub puc pue pup pur put puu rbb rbc rbe rbp rbr rbt rbu rcb rcc rce rcp rcr rct rcu re- reb rec ree rep rer ret reu rpb rpc rpe rpp rpr rpt rpu rrb rrc rrp rrr rrt rru rtb rtc rte rtp rtr rtt rtu rub ruc rue rup rur rut ruu tbb tbc tbe tbp tbr tbt tbu tcb tcc tce tcp tcr tct tcu te- teb tec tee tep ter tet teu tpb tpc tpe tpp tpr tpt tpu trb trc tre trp trr trt tru ttb ttc tte ttp ttr ttt ttu tub tuc tue tup tur tut tuu ubb ubc ube ubp ubr ubt ubu ucb ucc uce ucp ucr uct ucu ueb uec uee uep uer uet up- upb upc upe upp upr upt upu ur- urb urc ure urp urr urt uru utb utc ute utp utr utt utu uuc uue uur uut uuu

bbbb bbeb bbet bbpr bbrc bcbc bcbp bccc bcec bcer bcet bcpp bcru bctc bcuc bcup bebb bebe becu beeb beep beer beet berc bere berr bert beru betc bete bett betu beur bpcp bprc brcb brce breb brec bree brep brer bret brrr brtc bruc brue brup brut btbp btcc btec btrc btrt bttb bubb bube bubu bucc buce bucu buer bueu bupc bur- burb bure burp burr burt buru but- bute butt cbbc cbcc cbce cbcp cbcr cbct cbcu cbec cbee cber cbet cbpc cbpp cbre cbrt cbtc ccbc cccb cccc cccp cccu ccee ccpe ccpp ccpr ccrc ccre ccrp ccrt cctb cctc cctt ccuc ccup ccut cebp cebu cec- cece cecp cect ceeb ceec cepc cepe cepp cepr cept cer- cerc cere cerp cert cet- cete cetp cpbc cpce cpcu cpeb cpep cper cpre cprt cptp cptr crbc crbu crcc crce crcr cre- creb crec cree crep cret creu crpc crrt crtc crtp crub crue crup crut ctcp ctec ctep ctpp ctrc ctrp cub- cubb cube cucc cuce cuer cupe cupp cupr curb cure curr curt cut- cutc cute cutt ebbc ebbr ebcc eber ebru ebur ecbc ecbe eccb eccc ecce ecct ecpp ecrc ecrr ecru ect- ectc eeee eerc eetc eete eetu epcc epec epee eper eppc eppp eprb eprp epte epub erbb erbe ercc erce ercp ereb erec erer eret erpe errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etre ette ettu eubc euer eur- eurc eure eurt pbcc pcbc pccc pcce pcep pcer pcpb pcpp pcrc pcre pcte pece pecr pect peec peep peer peet pepe per- perc pere perp perr pert peru pete petr pett peur peut ppcc pper pppp pprc ppru pptt ppur prbc prcc prcp pre- preb prec pree prep pret preu prtc prtp prtr prue prut pruu ptcc pter pttc pu-e pube pubu puce puer puet pueu pupe pupu pur- purb pure purp purr puru put- pute putt putu puuc rbbb rbbr rcbc rccb rccc rcep rcet rcpt rctc rebb rebe rebu recc rece recp recr rect recu reeb reep reet repe repp repr rept repu rere rert reru rete retr rett reue reup reut reuu rpet rrrr rtcc rtce rtee rttp rubb rube rubp rubu ruce ruct ruer ruet rupe rupp rupt rurc rure rurp ruru rute rutt rutu tbcb tbcc tbce tbrb tbtp tccc tccu tcep tctc tebu tecr tect teec teer teet tepe tepp tepu ter- terc tere terp terr teru tete tetr tett tetu teut tpcp tper tppp tppr tpte tptp tptr tput trcc tre- trec tree tret treu trpc trpe trpp trtc trte trtr trub truc true trut truu ttbb ttcp tter tttt tubb tube tubr tubu tucc tuer tuet tupe tupu turb turc ture turp turr turt turu tute tutt tutu u-rp ubbe uber ubet ubpc ucbc uccp ucpb ucrc ucut upbe uppc uppe uppp uppu upup urbe ure- uret urre urte urup urur urut utec utep uter uttu uucp uuuu

-tree bbbee bccup be-er beber becue becut beebe beete beeut beppe beppu berbe bercu berec beret berre berru berte betee beter betre bett- bette beuer beure beute brebu brece breer breet brere brett breu- brrrr bruce bruer bruet brute btc-e btr-t bubbe buber bucet bucur burcu buret burru burte burtt buruc burut butec buter butte butut c-p-c c-tec ccccc ccett cebec ceber cebpb cebpe ceere cepet cerbu cerc- cerce cerec cerer ceret cerre certe cette cpctc crebe crece creep creer crepe crept crepu crete cretu creu- creue creup cruce cruet crupe crure cteep ctree cttee cubbe cubeb cuber cubub cueup cuper cupr- curce curer curet curre curup cutcu cutee cuter cutup ebber ebbet ebert ebure eccup eeeee eepee eperc epptb epure erbbe erber erect erept erere errtu erte erter eruct erupt etete etree etter eturu eucre eurre p-rep pcept pcert pctct pebre peebu peece peere peert peete pepee peppe pept- pepup perce perec perer peret perre perte peruc