-er b-u bbb bbc bbe bbg bbk bbr bbs bbu bcb bcc bce bcg bck bcr bcs bcu be- beb bec bee beg bek ber bes beu bgb bgc bge bgg bgk bgr bgs bgu bkb bkc bke bkg bkk bkr bks brb bre brg brk brr brs bru bsb bsc bse bsg bsk bsr bss bsu bub buc bue bug buk bur bus buu c-- cbb cbc cbe cbg cbk cbr cbs cbu ccb ccc cce ccg cck ccr ccs ccu ce- ceb cec cee ceg cek cer ces ceu cgb cgc cge cgg cgr cgs cgu ckb ckc cks crb crc cre crg crk crr crs cru csb csc cse csg csk csr css csu cub cuc cue cug cuk cur cus cuu ebb ebc ebe ebg ebk ebr ebs ebu ec- ecb ecc ece ecg eck ecr ecs ecu eeb eec eee eeg eek eer ees egb egc ege egg egr egs egu ekb ekc eke ekg ekr eks eku erb erc ere erg erk err ers eru es- esb esc ese esg esk esr ess esu eu- eub euc eue eug eur eus gbc gbe gbg gbk gbr gbs gbu gcb gcc gce gcg gck gcr gcs gcu ge- geb gec gee geg gek ger ges geu ggb ggc ggg ggr ggs ggu gkb gks grb grc gre grg grk grr grs gru gsb gsc gse gsg gsk gsr gss gsu gu- gub guc gue gug guk gur gus guu kbb kbc kbe kbk kbr kbs kbu kcb kcc kce kcg kck kcr kcs kcu ke- keb kec kee keg kek ker kes kgb kgc kgs kgu kkb kkc kke kkk kkr kks kku krc krg krk krr krs kru ksb ksc kse ksg ksk ksr kss ksu kub kuc kue kug kuk kur kus kuu rbb rbc rbe rbg rbk rbr rbs rbu rcb rcc rce rcg rcr rcs rcu re- reb rec ree reg rek rer res reu rgb rgc rge rgg rgk rgr rgs rkb rkc rke rkg rkk rks rku rrb rrc rrg rrk rrr rrs rru rsb rsc rse rsg rsk rsr rss rsu rub ruc rue rug ruk rur rus ruu sbb sbc sbe sbg sbk sbr sbs sbu scb scc sce scg sck scr scs scu se- seb sec see seg sek ser ses seu sgb sgc sge sgg sgk sgr sgs sgu sk- skb skc ske skg skk skr sks sku sr- srb src sre srg srk srr srs ss- ssb ssc sse ssg ssk ssr sss ssu sub suc sue sug suk sur sus suu ubb ubc ube ubg ubk ubr ubs ubu ucb ucc uce ucg uck ucr ucs ucu ueb uec uee ueg uer ues ugb ugc uge ugg ugk ugr ugs ugu ukb ukc uke ukk ukr uku ur- urb urc ure urg urk urr urs uru usb usc use usg usk usr uss usu uuc uue uug uur uus uuu

bbbb bbbs bbeb bbrc bbrg bcbc bcbg bcbs bccc bccs bcec bcer bces bcgs bcrs bcru bcsc bcss bcuc bebb bebe beck becs becu beeb beeg beek beer bees begg begs begu beke beks berc bere berg berk berr bers beru bes- bese besk bess beuk beur bggs brcb brce breb brec bree breg brek brer bres brkb brrr brrs brsb brsr bruc brue brug brus bscs bseb bsec bsee bseg bser bses bsgs bssc bsse bubb bube bubs bubu bucc buce buck bucs bucu buer bueu buge bugg bugs buke bukk buku bur- burb bure burg burk burr burs buru busc buse busk buss busu buus cbbc cbbs cbcc cbce cbcr cbcs cbcu cbec cbee cber cbgb cbkg cbkr cbre cbsc cbse cbus ccbc cccb cccc cccs cccu ccee ccgc ccgs ccrc ccre ccrg ccrs ccsg ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec cees cege ceke cer- cerc cere cers cesc cese cesg cesr cess cgcc cgcg cger cges cggs cgsb cgss ckbc ckbe ckck ckcs cker ckrc cksb crbc crbu crcc crce crcr cre- creb crec cree creg cres creu crgs crkc crss crub crue crug cruk crus cscb cscc csce cscr cscs csec csee cser csks csrc csrs csse cssr csur csus cub- cubb cube cubs cucc cuce cuck cuek cuer cues cuk- cuke curb cure curr curs cusb cusg cusk cuss cusu ebbc ebbr ebbs ebcc eber ebes ebru ebur ebus ecbc ecbe eccb eccc ecce eces ecgs ecks ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eegs eeke eeks eerc eerg eers eese eesk egbe egbu egcc egcg egcr egec egee eger eggb egge eggs egks egre egsc egss ekeb ekek eker ekes ekgs ekur erbb erbe ercc erce ereb erec erer eres erg- ergg ergs erke erks errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee esek eser eses eske esks esku esse essg essu esus eubc euer euge eur- eurc eure euse gbbs gc-c gcbc gccc gccs gcrg gcse gcss gcsu gebe gece geck geek geer gees gege gegg gerb gere gers geru gesg gesk gess gesu geue gggg ggss grbr grcc grce greb grec gree greg gres greu grrr grrs grss grub grue grug grur grus gskb gsse gsur gubb gubs gubu guck guer gues gugb guge gugg gugu gurb gure gurg gurk gurr gurs guru gusb guse guss guus kbbb kbbc kbbe kbbg kbbk kbbr kbbs kbbu kbcb kbce kbck kbcr kbcs kbcu kbeb kbec kbee kbek kber kbes kbgb kbge kbgg kbgr kbkb kbkg kbkk kbkr kbrb kbrc kbre kbrg kbrk kbru kbsb kbsg kbsk kbsr kbss kbsu kbub kbuc kbue kbuk kbur kbus kbuu kcbc kcbk kcbr kcbs kcbu kccb kccc kcck kccr kccu kceb kcec kcee kceg kceu kcgc kcgr kcgs kckc kckk kckr kcrc kcrg kcrr kcrs kcru kcsb kcsc kcse kcsg kcsr kcss kcsu kcub kcue kcuk kebb kebc kebe kebr kebu kecg keck kecr keek keer kees kege kegg kegk kegr kegs kekb kekc keke keks keku ker- kerb kerc kere kerk kerr kers keru kesb