-er -up b-p b-u bbb bbc bbe bbk bbp bbr bbu bcb bcc bce bck bcp bcr bcu be- beb bec bee bek bep ber beu bkb bkc bke bkk bkp bkr bpb bpc bpe bpp bpr bpu brb bre brk brp brr bru bub buc bue buk bup bur buu c-- cbb cbc cbe cbk cbp cbr cbu ccb ccc cce cck ccp ccr ccu ce- ceb cec cee cek cep cer ceu ckb ckc cpb cpc cpe cpk cpp cpr cpu crb crc cre crk crp crr cru cub cuc cue cuk cup cur cuu ebb ebc ebe ebk ebp ebr ebu ec- ecb ecc ece eck ecr ecu eeb eec eee eek eep eer ekb ekc eke ekp ekr eku ep- epb epc epe epp epr epu erb erc ere erk erp err eru eu- eub euc eue eup eur kbb kbc kbe kbk kbp kbr kbu kcb kcc kce kck kcp kcr kcu ke- keb kec kee kek kep ker kkb kkc kke kkk kkp kkr kku kpc kpe kpk kpp kpr kpu krc krk krp krr kru kub kuc kue kuk kup kur kuu p-p pbb pbc pbe pbk pbp pbr pbu pcb pcc pce pck pcp pcr pcu peb pec pee pek pep per peu pkb pkc pke pkp pkr pku ppb ppc ppe ppk ppp ppr ppu prb prc pre prk prp prr pru pub puc pue puk pup pur puu rbb rbc rbe rbk rbp rbr rbu rcb rcc rce rcp rcr rcu re- reb rec ree rek rep rer reu rkb rkc rke rkk rkp rku rpb rpc rpe rpk rpp rpr rpu rrb rrc rrk rrp rrr rru rub ruc rue ruk rup rur ruu ubb ubc ube ubk ubp ubr ubu ucb ucc uce uck ucp ucr ucu ueb uec uee uep uer ukb ukc uke ukk ukp ukr uku up- upb upc upe upk upp upr upu ur- urb urc ure urk urp urr uru uuc uue uur uuu

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

b-r-k bbbee bccup be-er bebek beber becke becue beebe beeke beker bekke beppe beppu berbe berck bercu berec berek berk- berke berre berru beuer beure brebu brece breck breek breer breke brere breu- brrrr bruce bruck bruer bruke bubbe buber bucek bucku bucur buker bukk- burck burcu burek burke burru buruc buruk c-p-c ccccc cebec ceber cebpb cebpe ceere cerbu cerc- cerce cerec cerer cerke cerre crebe crece creek creep creer creke crepe crepu creu- creue creup cruce cruck cruke crupe crure cubbe cubeb cuber cubub cucuk cueup cuker cuper cupr- curce curer curre curup ebber ebure eccup ecker eecke eeeee eepee ekker ekuku ekuru eperc epuku epure erbbe erber erere erkec eruke eucre eurre k-p-r kebbe kebek keber kecer keepe keere kekec keppe kerek kerep kerre krbpe kreek kreep