-er b-u bbb bbc bbd bbe bbg bbk bbr bbu bcb bcc bcd bce bcg bck bcr bcu bdb bdc bdd bde bdg bdk bdr bdu be- beb bec bed bee beg bek ber beu bgb bgc bgd bge bgg bgk bgr bgu bkb bkc bke bkg bkk bkr brb brd bre brg brk brr bru bub buc bud bue bug buk bur buu c-- cbb cbc cbd cbe cbg cbk cbr cbu ccb ccc ccd cce ccg cck ccr ccu cdb cdc cdd cde cdg cdk cdr cdu ce- ceb cec ced cee ceg cek cer ceu cgb cgc cgd cge cgg cgr cgu ckb ckc ckd crb crc crd cre crg crk crr cru cub cuc cud cue cug cuk cur cuu dbb dbc dbd dbe dbg dbk dbr dbu dcb dcc dcd dce dcg dck dcr dcu ddb ddc ddd dde ddg ddk ddr ddu de- deb dec ded dee deg dek der deu dgc dgd dge dgg dgk dgr dgu dkb dkc dke dkg dkk dkr dku drb drc drd dre drg drk drr dru dub duc dud due dug duk dur ebb ebc ebd ebe ebg ebk ebr ebu ec- ecb ecc ecd ece ecg eck ecr ecu ed- edb edc edd ede edg edk edr edu eeb eec eed eee eeg eek eer egb egc egd ege egg egr egu ekb ekc ekd eke ekg ekr eku erb erc erd ere erg erk err eru eu- eub euc eud eue eug eur g-d gbc gbd gbe gbg gbk gbr gbu gcb gcc gcd gce gcg gck gcr gcu gdb gdc gdd gde gdk gdr gdu ge- geb gec ged gee geg gek ger geu ggb ggc ggd ggg ggr ggu gkb gkd grb grc grd gre grg grk grr gru gu- gub guc gud gue gug guk gur guu kbb kbc kbd kbe kbk kbr kbu kcb kcc kcd kce kcg kck kcr kcu kdb kdc kde kdg kdk kdr kdu ke- keb kec ked kee keg kek ker kgb kgc kgd kgu kkb kkc kke kkk kkr kku krc krd krg krk krr kru kub kuc kud kue kug kuk kur kuu rbb rbc rbd rbe rbg rbk rbr rbu rcb rcc rcd rce rcg rcr rcu rdb rdc rdd rde rdg rdr rdu re- reb rec red ree reg rek rer reu rgb rgc rgd rge rgg rgk rgr rkb rkc rke rkg rkk rku rrb rrc rrd rrg rrk rrr rru rub ruc rud rue rug ruk rur ruu ubb ubc ube ubg ubk ubr ubu ucb ucc ucd uce ucg uck ucr ucu udb udc udd ude udg udk udr udu ueb uec ued uee ueg uer ugb ugc uge ugg ugk ugr ugu ukb ukc uke ukk ukr uku ur- urb urc urd ure urg urk urr uru uuc uue uug uur uuu

bbbb bbdd bbeb bbrc bbrg bcbc bcbg bccc bcde bcec bcer bcru bcuc bd-r bdbc bddc bebb bebe beck becu bede bedu beeb beed beeg beek beer begg begu beke berc berd bere berg berk berr beru beuk beur bkgd brcb brce breb brec bred bree breg brek brer brkb brrr bruc brud brue brug bubb bube bubu bucc buce buck bucu budb budd bude budg budu buer bueu buge bugg buke bukk buku bur- burb burd bure burg burk burr buru c-cd cbbc cbcc cbce cbcr cbcu cbdb cbdc cbec cbee cber cbgb cbkg cbkr cbrd cbre ccbc cccb cccc cccu ccdc ccdr cced ccee ccgc ccrc ccre ccrg ccuc cd-e cd-r cddb cddr cdec cder cdre cebu cec- cece cedd cede cedu ceeb ceec cege ceke cer- cerc cerd cere cgcc cgcg cged cger ckbc ckbe ckck ckdu cker ckrc ckrd crbc crbu crcc crce crcr crdc cre- creb crec cred cree creg creu crkc crub crud crue crug cruk cub- cubb cube cucc cuce cuck cude cued cuek cuer cuk- cuke curb curd cure curr dbcc dcbc dccb dccc dccu dcdb dcrk dddd ddrc ddre ddub debe debu dec- decc decd dece deck dedd dede dedu deeb deed deeg deek deer dege degu dek- deke der- derb derc dere derg derk derr deue deuk deur dgeg dgge dgkb dgkd dgkg dkdc drbc dred dree dreg drek drge drub drue drug druk druu dub- dubb dubc dube dubu duce duck dudd dude dudu duer dugu duke duku dure durg durk duru duur ebbc ebbr ebcc ebed eber ebru ebur ecbc ecbe eccb eccc ecce ecdc eced ecrc ecrr ecru eddc edde ede- eder edge edru educ edur eede eedu eeee eeke eerc eerg egbe egbu egcc egcg egcr egec egee eger eggb egge egre ekeb eked ekek eker ekur erbb erbe ercc erce erde ereb erec ered erer erg- ergg erke errc erre erub eruc erur eubc eucd eude euer euge eur- eurc eure gbde gc-c gcbc gccc gcrg gddb gdrc gebe gece geck gedd gede gedu geed geek geer gege gegg gerb gerd gere geru geue gggg grbr grcc grce grdc greb grec gree greg greu grrr grub grue grug grur gubb gubu guck gude gudu guer gugb guge gugg gugu gurb gurd gure gurg gurk gurr guru kbbb kbbc kbbd kbbe kbbg kbbk kbbr kbbu kbcb kbce kbck kbcr kbcu kbdb kbde kbdg kbdr kbeb kbec kbed kbee kbek kber kbgb kbge kbgg kbgr kbkb kbkg kbkk kbkr kbrb kbrc kbrd kbre kbrg kbrk kbru kbub kbuc kbud kbue kbuk kbur kbuu kcbc kcbd kcbk kcbr kcbu kccb kccc kccd kcck kccr kccu kcdc kcdd kcdr kcdu kceb kcec kced kcee kceg kceu kcgc kcgr kckc kckk kckr kcrc kcrg kcrr kcru kcub kcue kcuk kdbb kdbg kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddg kddk kddr kdeb kdec kdge kdkb kdkd kdkk kdkr kdrb kdub kduc kdug kdur kebb kebc kebe kebr kebu kecg keck kecr kedb kedc kedd kede kedg kedr keed keek keer kege kegg kegk kegr kekb kekc keke keku ker- kerb kerc kere kerk kerr keru keug keur kgbb kgbc kgbr kgcb kgcc kgcd kgce kgcr