-er eee eef eeg eek een eer ees ef- efe eff efg efi efr efs ege egf egg egi egn egr egs eie eif eig eii eik ein eir eis eke ekf ekg eki ekr eks en- ene enf eng eni enk enn enr ens ere erf erg eri erk ern err ers es- ese esf esg esi esk esn esr ess fee fef feg fei fek fen fer fes ffe fff ffg ffi ffk ffn ffr ffs fge fgf fgg fgi fgn fgr fgs fie fif fig fii fik fin fir fis fkf fkg fki fkk fne fnf fng fni fnk fnn fnr fns fre frf frg fri frk frn frr frs fse fsf fsg fsi fsk fsn fsr fss ge- gee gef geg gei gek gen ger ges gfe gff gfi gfk gfr gfs ggg ggi ggn ggr ggs gie gif gig gii gik gin gir gis gkn gks gne gnf gni gnn gnr gns gre grf grg gri grk grn grr grs gse gsf gsg gsi gsk gsn gsr gss i-f ie- iee ief ieg iei iek ien ier ies ife iff ifg ifi ifn ifr ifs ige igf igg igi igk ign igr igs iie iif iii iin iir iis ike ikf iki ikk ikr iks in- ine inf ing ini ink inn inr ins ir- ire irf irg iri irk irn irr irs is- ise isf isg isi isk isn isr iss ke- kee kef keg kei kek ken ker kes kff kfg kfi kfs kgf kgi kgs kie kif kig kii kik kin kir kis kke kki kkk kkn kkr kks kn- kne knf kng kni knk knn knr krf krg kri krk krn krr krs kse ksf ksg ksi ksk ksn ksr kss n-i ne- nee nef neg nei nek nen ner nes nfe nff nfi nfk nfn nfr nfs nge ngf ngg ngi ngk ngn ngs nie nif nig nii nik nin nir nis nke nkf nki nkk nkn nkr nks nne nnf nng nni nnk nnn nns nre nrf nrg nri nrk nrn nrr nrs nse nsf nsg nsi nsk nsn nsr nss re- ree ref reg rei rek ren rer res rfe rff rfg rfi rfk rfn rfr rfs rge rgf rgg rgi rgk rgn rgr rgs rie rif rig rii rik rin rir ris rke rkf rkg rkk rks rng rni rnn rnr rns rrf rrg rri rrk rrn rrr rrs rse rsf rsg rsi rsk rsn rsr rss se- see sef seg sei sek sen ser ses sfe sff sfg sfi sfk sfn sfr sfs sge sgf sgg sgi sgk sgn sgr sgs sie sif sig sii sik sin sir sis sk- ske skf skg ski skk skr sks sne snf sng sni snk snn snr sns sr- sre srf srg sri srk srn srr srs ss- sse ssf ssg ssi ssk ssn ssr sss