bbbb bbeb bbpr bbrc bcbc bcbp bccc bcec bcer bcpp bcru bcuc bcup bebb bebe beck becu beeb beek beep beer beke berc bere berk berr beru beuk beur bkpr bpcp bprc brcb brce breb brec bree brek brep brer brkb brrr bruc brue brup bubb bube bubu bucc buce buck bucu buer bueu buke bukk buku bupc bur- burb bure burk burp burr buru cbbc cbcc cbce cbcp cbcr cbcu cbec cbee cber cbkr cbpc cbpp cbre ccbc cccb cccc cccp cccu ccee ccpe ccpp ccpr ccrc ccre ccrp ccuc ccup cebp cebu cec- cece cecp ceeb ceec ceke cepc cepe cepp cepr cer- cerc cere cerp ckbc ckbe ckck cker ckpc ckpr ckrc cpbc cpce cpcu cpeb cpep cper cpre crbc crbu crcc crce crcr cre- creb crec cree crep creu crkc crkp crpc crub crue cruk crup cub- cubb cube cucc cuce cuck cuek cuer cuk- cuke cupe cupp cupr curb cure curr ebbc ebbr ebcc eber ebru ebur ecbc ecbe eccb eccc ecce ecpp ecrc ecrr ecru eeee eeke eerc ekeb ekek eker ekpe ekur epcc epec epee eper eppc eppp eprb eprp epub erbb erbe ercc erce ercp ereb erec erer erke erpe errc erre erub eruc erur eubc euer eur- eurc eure kbbb kbbc kbbe kbbk kbbr kbbu kbcb kbce kbck kbcr kbcu kbeb kbec kbee kbek kber kbkb kbkk kbkr kbpc kbpe kbpk kbpr kbpu kbrb kbrc kbre kbrk kbru kbub kbuc kbue kbuk kbup kbur kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kceb kcec kcee kcep kceu kckc kckk kckr kcpc kcpr kcpu kcrc kcrp kcrr kcru kcub kcue kcuk kcup kebb kebc kebe kebr kebu keck kecr keek keep keer kekb kekc keke keku kep- kepc kepe kepu ker- kerb kerc kere kerk kerp kerr keru keup keur kkbb kkbe kkbr kkcb kkck kkcr kkkk kkpc kkpk kkrb kkrc kkre kkrk kkrr kkup kkuu kpbb kpbe kpbr kpcc kpcr kpek kper kpke kpkk kpkr kppc kppk kppp kppr kprb kprc kpre kprk kprp kprr kpru kpub kpur krbb krbe krbk krbr krcb krcc krce krcu kreb krec kree krek kreu krkc krke krkk krkr krku krpr krpu krrb krrc krre krrk krrr kruc krue kruk krup krur kubb kubc kube kubr kubu kucb kucc kuce kucp kucr kuek kueu kuke kukk kuku kupb kupe kupr kupu kurb kure kurk kurr kuru kuub kuuk kuur kuuu pbcc pbpk pcbc pccc pcce pcep pcer pcpb pcpp pcrc pcre pece peck pecr peec peek peep peer peke pekk pepe per- perc pere perk perp perr peru peur ppcc pper pppp pprc ppru ppur prbc prcc prcp pre- preb prec pree prek prep preu prue pruu pu-e pube pubu puce puck puer pueu puke puku pupe pupu pur- purb pure purp purr puru puuc rbbb rbbr rcbc rccb rccc rcep rebb rebe rebk rebu recc rece reck recp recr recu reeb reek reep reke repe repp repr repu rere reru reue reuk reup reuu rrrr rubb rube rubp rubu ruce ruck ruer ruke rukk ruku rupe rupp rurc rure rurp ruru u-rp ubbe ubek uber ubpc ucbc uccp ucpb ucrc ukcc ukek ukeu ukrc ukup ukur upbe uppc uppe uppp uppu upup urbe ure- urke urre uruk urup urur uucp uuuu