-er -up b-p b-u bbb bbc bbe bbf bbp bbr bbt bbu bcb bcc bce bcf bcp bcr bct bcu be- beb bec bee bef bep ber bet beu bfb bfc bfe bff bfp bfr bft bfu bpb bpc bpe bpf bpp bpr bpt bpu brb bre brf brp brr brt bru btb btc bte btf btp btr btt btu bub buc bue buf bup bur but buu c-- cbb cbc cbe cbf cbp cbr cbt cbu ccb ccc cce ccf ccp ccr cct ccu ce- ceb cec cee cef cep cer cet ceu cfb cfc cfe cff cfp cfr cft cfu cpb cpc cpe cpf cpp cpr cpt cpu crb crc cre crf crp crr crt cru ctb ctc cte ctf ctp ctr ctt ctu cub cuc cue cuf cup cur cut cuu ebb ebc ebe ebf ebp ebr ebt ebu ec- ecb ecc ece ecf ecr ect ecu eeb eec eee eef eep eer eet ef- efb efc efe eff efp efr eft ep- epb epc epe epf epp epr ept epu erb erc ere erf erp err ert eru etb etc ete etf etp etr ett etu eu- eub euc eue euf eup eur eut fbb fbc fbe fbf fbp fbr fbt fbu fcb fcc fce fcf fcp fcr fct fcu feb fec fee fef fep fer fet feu ffc ffe fff ffp ffr fft ffu fpb fpc fpe fpp fpr fpt fpu frb frc fre frf frp frr frt fru ftb ftc fte ftf ftp ftr ftt ftu fub fue fuf fup fur fut fuu p-p pbb pbc pbe pbf pbp pbr pbt pbu pcb pcc pce pcf pcp pcr pct pcu peb pec pee pef pep per pet peu pfb pfc pfe pff pfp pfr pft pfu ppb ppc ppe ppf ppp ppr ppt ppu prb prc pre prf prp prr prt pru pt- ptb ptc pte ptf ptp ptr ptt ptu pub puc pue puf pup pur put puu rbb rbc rbe rbf rbp rbr rbt rbu rcb rcc rce rcf rcp rcr rct rcu re- reb rec ree ref rep rer ret reu rfb rfc rfe rff rfp rfr rft rfu rpb rpc rpe rpf rpp rpr rpt rpu rrb rrc rrf rrp rrr rrt rru rtb rtc rte rtf rtp rtr rtt rtu rub ruc rue ruf rup rur rut ruu tbb tbc tbe tbf tbp tbr tbt tbu tcb tcc tce tcf tcp tcr tct tcu te- teb tec tee tef tep ter tet teu tfb tfc tfe tff tfp tfr tft tfu tpb tpc tpe tpf tpp tpr tpt tpu trb trc tre trf trp trr trt tru ttb ttc tte ttf ttp ttr ttt ttu tub tuc tue tuf tup tur tut tuu ubb ubc ube ubf ubp ubr ubt ubu ucb ucc uce ucf ucp ucr uct ucu ueb uec uee uef uep uer uet ufc ufe uff ufp ufr uft ufu up- upb upc upe upf upp upr upt upu ur- urb urc ure urf urp urr urt uru utb utc ute utf utp utr utt utu uuc uue uur uut uuu

bbbb bbeb bbet bbfc bbpr bbrc bcbc bcbp bccc bcec bcer bcet bcfc bcpp bcru bctc bcuc bcup bebb bebe becu beeb beef beep beer beet befe beff beft berc bere berr bert beru betc bete bett betu beur bfpp bftt bpcp bpfc bprc bptf brcb brce breb brec bree bref brep brer bret brfc brfu brrr brtc bruc brue brup brut btbp btcc btec btfc btrc btrt bttb bubb bube bubu bucc buce bucu buer bueu bufc bufe buff bufr bupc bur- burb bure burp burr burt buru but- bute butt cbbc cbcc cbce cbcp cbcr cbct cbcu cbec cbee cbef cber cbet cbfb cbfc cbpc cbpp cbre cbrt cbtc cbtf ccbc cccb cccc cccf cccp cccu ccee ccfc ccff ccpe ccpp ccpr ccrc ccre ccrf ccrp ccrt cctb cctc cctt ccuc ccup ccut cebp cebu cec- cece cecp cect ceeb ceec cef- cefc cepc cepe cepp cepr cept cer- cerc cere cerf cerp cert cet- cete cetp cfbc cfbr cfbt cfcb cfcf cffb cffr cfpr cfrb cfre cfrp cfrt cftc cfte cftr cpbc cpce cpcu cpeb cpep cper cpff cpft cpre cprt cptp cptr crbc crbu crcc crce crcr cre- creb crec cree crep cret creu crfc crpc crrt crtc crtf crtp crub crue crup crut ctcf ctcp ctec ctep ctfc ctpp ctrc ctrp cub- cubb cube cucc cuce cuer cufc cuff cupe cupp cupr curb cure curf curr curt cut- cutc cute cutt ebbc ebbr ebcc eber ebfc ebru ebur ecbc ecbe eccb eccc ecce ecct ecef ecfc ecfr ecpp ecrc ecrf ecrr ecru ect- ectc ectf eeee eefe eerc eetc eete eetu efbr efet eft- eftp eftu epcc epec epee eper epfc eppc eppp eprb eprp epte epub erbb erbe ercc erce ercp ereb erec erer eret erfc erft erpe errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etfb etfc etfe etre ette ettu eubc euer eufc eur- eurc eure eurt fccf fccp fcup fece fect feeb feer feet fefc fefe feff fepc ferb ferc fere ferr fert feru fete fetp fetr fett fetu ffcc ffee ffff ffrr fftf fp-c fpcc fpct fprf frbc frcc frcp free frep fret frfc frub frue ft-c fter ftfc ftpe ftub ftuc fubb fubu fuc- fuct fuet fufc fuff fufu fur- fure furr furt fute futu pbcc pbrf pcbc pccc pcce pcep pcer pcfc pcpb pcpp pcrc pcre pcrf pcte pece pecr pect peec peep peer peet pefc peff pepe per- perc pere perf perp perr pert peru pete petr pett peur peut pfcb pfce pfet pfff pffr pfft pfte ppcc pper pppp pprc pprf ppru pptt ppur prbc prcc prcf prcp pre- preb prec pree pref prep pret preu prfc prtc prtp prtr prue pruf prut pruu ptcc pter ptrf pttc pu-e pube pubu puce puer puet pueu puff puft pupe pupu pur- purb pure purp purr puru put- pute putt putu puuc rbbb rbbr rcbc rccb rccc rcep rcet