-er -ic b-u bbb bbc bbe bbg bbi bbk bbl bbr bbs bbu bcb bcc bce bcg bci bck bcl bcr bcs bcu be- beb bec bee beg bei bek bel ber bes beu bgb bgc bge bgg bgi bgk bgl bgr bgs bgu bi- bib bic bie big bii bik bil bir bis biu bkb bkc bke bkg bkk bkl bkr bks blb blc ble blg bli blk bll blr bls blu brb bre brg bri brk brl brr brs bru bsb bsc bse bsg bsi bsk bsl bsr bss bsu bub buc bue bug bui buk bul bur bus buu c-- cbb cbc cbe cbg cbi cbk cbl cbr cbs cbu ccb ccc cce ccg cci cck ccl ccr ccs ccu ce- ceb cec cee ceg cei cek cel cer ces ceu cgb cgc cge cgg cgi cgl cgr cgs cgu ci- cib cic cie cig cii cik cil cir cis ciu ckb ckc cki cks cl- clb clc cle clg cli clk cll clr cls clu crb crc cre crg cri crk crl crr crs cru csb csc cse csg csi csk csl csr css csu cub cuc cue cug cui cuk cul cur cus cuu ebb ebc ebe ebg ebi ebk ebl ebr ebs ebu ec- ecb ecc ece ecg eci eck ecl ecr ecs ecu eeb eec eee eeg eek eel eer ees egb egc ege egg egi egl egr egs egu eib eic eie eig eii eik eil eir eis eiu ekb ekc eke ekg eki ekl ekr eks eku elb elc ele elg eli elk ell elr els elu erb erc ere erg eri erk erl err ers eru es- esb esc ese esg esi esk esl esr ess esu eu- eub euc eue eug eui eul eur eus gbc gbe gbg gbi gbk gbl gbr gbs gbu gcb gcc gce gcg gci gck gcl gcr gcs gcu ge- geb gec gee geg gei gek gel ger ges geu ggb ggc ggg ggi ggr ggs ggu gib gic gie gig gii gik gil gir gis giu gkb gks glb glc gle glg gli glk gll glr gls glu grb grc gre grg gri grk grl grr grs gru gsb gsc gse gsg gsi gsk gsl gsr gss gsu gu- gub guc gue gug gui guk gul gur gus guu ibb ibc ibe ibg ibi ibk ibl ibr ibs ibu icb icc ice icg ici ick icl icr ics icu ie- iec iee ieg iei iek iel ier ies igb igc ige igg igi igk igl igr igs igu iib iic iie iii iil iir iis iiu ikb ikc ike iki ikk ikl ikr iks iku il- ilb ilc ile ilg ili ilk ill ilr ils ilu ir- irb irc ire irg iri irk irl irr irs iru is- isb isc ise isg isi isk isl isr iss isu iu- iub iuc iue iug iui iur ius kbb kbc kbe kbi kbk kbl kbr kbs kbu kcb kcc kce kcg kci kck kcl kcr kcs kcu ke- keb kec kee keg kei kek kel ker kes kgb kgc kgi kgl kgs kgu kib kic kie kig kii kik kil kir kis kiu kkb kkc kke kki kkk kkl kkr kks kku kl- klb klc klg kli klr kls klu krc krg kri krk krl krr krs kru ksb ksc kse ksg ksi ksk ksl ksr kss ksu kub kuc kue kug kui kuk kul kur kus kuu lbb lbc lbe lbg lbi lbk lbl lbr lbs lbu lcb lcc lce lcg lci lck lcl lcr lcs lcu leb lec lee leg lei lek lel ler les leu lgb lgc lge lgg lgi lgk lgl lgr lgs lgu lib lic lie lig lii lik lil lir lis liu lkb lkg lkl lkr lks llb llc lle llg lli llk lll llr lls llu lrb lrc lrg lri lrk lrr lrs lru lsb lsc lse lsg lsi lsk lsl lsr lss lsu lub luc lue lug lui luk lul lur lus luu rbb rbc rbe rbg rbi rbk rbl rbr rbs rbu rcb rcc rce rcg rci rcl rcr rcs rcu re- reb rec ree reg rei rek rel rer res reu rgb rgc rge rgg rgi rgk rgr rgs rib ric rie rig rii rik ril rir ris rkb rkc rke rkg rkk rks rku rlc rle rlg rli rll rlr rls rlu rrb rrc rrg rri rrk rrl rrr rrs rru rsb rsc rse rsg rsi rsk rsl rsr rss rsu rub ruc rue rug rui ruk rur rus ruu sbb sbc sbe sbg sbi sbk sbl sbr sbs sbu scb scc sce scg sci sck scl scr scs scu se- seb sec see seg sei sek sel ser ses seu sgb sgc sge sgg sgi sgk sgl sgr sgs sgu sib sic sie sig sii sik sil sir sis siu sk- skb skc ske skg ski skk skl skr sks sku slb slc sle slg sli slk sll slr sls slu sr- srb src sre srg sri srk srl srr srs ss- ssb ssc sse ssg ssi ssk ssl ssr sss ssu sub suc sue sug sui suk sul sur sus suu ubb ubc ube ubg ubi ubk ubl ubr ubs ubu ucb ucc uce ucg uci uck ucl ucr ucs ucu ueb uec uee ueg uei uel uer ues ugb ugc uge ugg ugi ugk ugl ugr ugs ugu uib uic uie uig uii uil uir uis uiu ukb ukc uke uki ukk ukl ukr uku ulb ulc ule ulg uli ulk ull ulr uls ulu ur- urb urc ure urg uri urk url urr urs uru usb usc use usg usi usk usl usr uss usu uuc uue uug uur uus uuu

bbbb bbbs bbci bbeb bblb bbls bbrc bbrg bcbc bcbg bcbs bccc bcci bccl bccs bcec bcer bces bcgs bcie bcis bcrs bcru bcsc bcsl bcss bcuc bebb bebe bebi beci beck becs becu beeb beeg beek beel beer bees begg begi begs begu beic beik beil beir beis