bbbb bbeb bbet bbpr bbrc bcbc bcbp bccc bcec bcer bcet bcpp bcru bctc bcuc bcup bebb bebe beck becu beeb beek beep beer beet beke berc bere berk berr bert beru betc bete bett betu beuk beur bkpr bkpt bpcp bprc brcb brce breb brec bree brek brep brer bret brkb brrr brtc bruc brue brup brut btbp btcc btec btek btrc btrt bttb bubb bube bubu bucc buce buck bucu buer bueu buke bukk buku bupc bur- burb bure burk burp burr burt buru but- bute butt cbbc cbcc cbce cbcp cbcr cbct cbcu cbec cbee cber cbet cbkr 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 ceke cepc cepe cepp cepr cept cer- cerc cere cerp cert cet- cete cetp ckbc ckbe ckck cker ckpc ckpr ckrc cktb cpbc cpce cpcu cpeb cpep cper cpre cprt cptp cptr crbc crbu crcc crce crcr cre- creb crec cree crep cret creu crkc crkp crpc crrt crtc crtp crub crue cruk crup crut ctcp ctec ctep ctpp ctrc ctrp cub- cubb cube cucc cuce cuck cuek cuer cuk- cuke 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 eeke eerc eetc eete eetu ekeb ekek eker eket ekpe ekur epcc epec epee eper eppc eppp eprb eprp epte epub erbb erbe ercc erce ercp ereb erec erer eret erke erpe errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etre ette ettu eubc euer eur- eurc eure eurt kbbb kbbc kbbe kbbk kbbr kbbt kbbu kbcb kbce kbck kbcr kbct kbcu kbeb kbec kbee kbek kber kbet kbkb kbkk kbkr kbpc kbpe kbpk kbpr kbpt kbpu kbrb kbrc kbre kbrk kbrt kbru kbtb kbtc kbte kbtk kbtr kbtt kbub kbuc kbue kbuk kbup kbur kbut kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kcct kccu kceb kcec kcee kcep kcet kceu kckc kckk kckr kcpc kcpr kcpt kcpu kcrc kcrp kcrr kcrt kcru kctb kctc kcte kctu kcub kcue kcuk kcup kebb kebc kebe kebr kebt kebu keck kecr keek keep keer keet kekb kekc keke keku kep- kepc kepe kept kepu ker- kerb kerc kere kerk kerp kerr kert keru ket- ketc kete ketk ketp ketr kett ketu keup keur kkbb kkbe kkbr kkbt kkcb kkck kkcr kkct kkkk kkpc kkpk kkpt kkrb kkrc kkre kkrk kkrr kkrt kktc kktk kktu kkup kkut kkuu kpbb kpbe kpbr kpcc kpcr kpek kper kpet kpke kpkk kpkr kppc kppk kppp kppr kprb kprc kpre kprk kprp kprr kprt kpru kpte kptr kptt kpub kpur krbb krbe krbk krbr krbt krcb krcc krce krcu kreb krec kree krek kret kreu krkc krke krkk krkr krku krpr krpt krpu krrb krrc krre krrk krrr krrt krtc krtk krtr kruc krue kruk krup krur ktbb ktbc ktbr ktbt ktbu ktcc ktce ktck ktcr ktec ktee ktek ktep ktkb ktkc ktke ktkk ktkr ktkt ktku ktpk ktpr ktpt ktrb ktrc ktre ktrk ktrp ktrr ktrt ktru kttc kttk kttp kttr kttt kttu ktub ktuc kubb kubc kube kubr kubu kucb kucc kuce kucp kucr kuek kueu kuke kukk kuku kupb kupe kupr kupt kupu kurb kure kurk kurr kurt kuru kute kutp kutr kutt kutu kuub kuuk kuur kuuu pbcc pbpk pcbc pccc pcce pcep pcer pcpb pcpp pcrc pcre pcte pece peck pecr pect peec peek peep peer peet peke pekk pepe per- perc pere perk perp perr pert peru pete petr pett peur peut ppcc pper pppp pprc ppru pptt ppur prbc prcc prcp pre- preb prec pree prek prep pret preu prtc prtp prtr prue prut pruu ptcc pter pttc pttk pu-e pube pubu puce puck puer puet pueu puke puku pupe pupu pur- purb pure purp purr puru put- pute putt putu puuc rbbb rbbr rcbc rccb rccc rcep rcet rcpt rctc rebb rebe rebk rebu recc rece reck recp recr rect recu reeb reek reep reet reke rekt repe repp repr rept repu rere rert reru rete retr rett reue reuk reup reut reuu rpet rrrr rtcc rtce rtee rttp rubb rube rubp rubu ruce ruck ruct ruer ruet ruke rukk ruku rupe rupp rupt rurc rure rurp ruru rute rutt rutu tbcb tbcc tbce tbrb tbtp tccc tccu tcep tctc tebu teck tecr tect teec teek teer teet teke tepe tepp tepu ter- terc tere terk terp terr teru tete tetr tett tetu teuk teut tpck tpcp tper tpke tppp tppr tpte tptp tptr tput trcc tre- trec tree trek tret treu trpc trpe trpp trtc trte trtr trub truc true truk trut truu ttbb ttcp tter tttt tubb tube tubr tubu tucc tuck tuer tuet tuke tupe tupu turb turc ture turk turp turr turt turu tute tutt tutu u-rp ubbe ubek uber ubet ubpc ucbc uccp ucpb ucrc ucut ukcc ukek ukeu ukrc ukup ukur upbe uppc uppe uppp uppu upup urbe ure- uret urke urre urte uruk urup urur urut utec utep uter uttu uucp uuuu