-er bbb bbe bbg bbi bbk bbn bbr bbs be- beb bee beg bei bek ben ber bes bgb bge bgg bgi bgk bgn bgr bgs bi- bib bie big bii bik bin bir bis bkb bke bkg bkk bkn bkr bks bnb bne bng bni bnk bnn bnr bns brb bre brg bri brk brn brr brs bsb bse bsg bsi bsk bsn bsr bss ebb ebe ebg ebi ebk ebn ebr ebs eeb eee eeg eek een eer ees egb ege egg egi egn egr egs eib eie eig eii eik ein eir eis ekb eke ekg eki ekr eks en- enb ene eng eni enk enn enr ens erb ere erg eri erk ern err ers es- esb ese esg esi esk esn esr ess gbe gbg gbi gbk gbn gbr gbs ge- geb gee geg gei gek gen ger ges ggb ggg ggi ggn ggr ggs gib gie gig gii gik gin gir gis gkb gkn gks gnb gne gni gnn gnr gns grb gre grg gri grk grn grr grs gsb gse gsg gsi gsk gsn gsr gss ibb ibe ibg ibi ibk ibn ibr ibs ie- iee ieg iei iek ien ier ies igb ige igg igi igk ign igr igs iib iie iii iin iir iis ikb ike iki ikk ikr iks in- inb ine ing ini ink inn inr ins ir- irb ire irg iri irk irn irr irs is- isb ise isg isi isk isn isr iss kbb kbe kbi kbk kbn kbr kbs ke- keb kee keg kei kek ken ker kes kgb kgi kgs kib kie kig kii kik kin kir kis kkb kke kki kkk kkn kkr kks kn- kne kng kni knk knn knr krg kri krk krn krr krs ksb kse ksg ksi ksk ksn ksr kss n-i nbb nbe nbg nbi nbk nbn nbr nbs ne- neb nee neg nei nek nen ner nes ngb nge ngg ngi ngk ngn ngs nib nie nig nii nik nin nir nis nke nki nkk nkn nkr nks nnb nne nng nni nnk nnn nns nrb nre nrg nri nrk nrn nrr nrs nsb nse nsg nsi nsk nsn nsr nss rbb rbe rbg rbi rbk rbn rbr rbs re- reb ree reg rei rek ren rer res rgb rge rgg rgi rgk rgn rgr rgs rib rie rig rii rik rin rir ris rkb rke rkg rkk rks rnb rng rni rnn rnr rns rrb rrg rri rrk rrn rrr rrs rsb rse rsg rsi rsk rsn rsr rss sbb sbe sbg sbi sbk sbn sbr sbs se- seb see seg sei sek sen ser ses sgb sge sgg sgi sgk sgn sgr sgs sib sie sig sii sik sin sir sis sk- skb ske skg ski skk skr sks snb sne sng sni snk snn snr sns sr- srb sre srg sri srk srn srr srs ss- ssb sse ssg ssi ssk ssn ssr sss