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