-er eee eef eek een eer ees ef- efe eff efi efr efs eie eif eii eik ein eir eis eke ekf eki ekr eks en- ene enf eni enk enn enr ens ere erf eri erk ern err ers es- ese esf esi esk esn esr ess fee fef fei fek fen fer fes ffe fff ffi ffk ffn ffr ffs fie fif fii fik fin fir fis fkf fki fkk fne fnf fni fnk fnn fnr fns fre frf fri frk frn frr frs fse fsf fsi fsk fsn fsr fss i-f ie- iee ief iei iek ien ier ies ife iff ifi ifn ifr ifs iie iif iii iin iir iis ike ikf iki ikk ikr iks in- ine inf ini ink inn inr ins ir- ire irf iri irk irn irr irs is- ise isf isi isk isn isr iss ke- kee kef kei kek ken ker kes kff kfi kfs kie kif kii kik kin kir kis kke kki kkk kkn kkr kks kn- kne knf kni knk knn knr krf kri krk krn krr krs kse ksf ksi ksk ksn ksr kss n-i ne- nee nef nei nek nen ner nes nfe nff nfi nfk nfn nfr nfs nie nif nii nik nin nir nis nke nkf nki nkk nkn nkr nks nne nnf nni nnk nnn nns nre nrf nri nrk nrn nrr nrs nse nsf nsi nsk nsn nsr nss re- ree ref rei rek ren rer res rfe rff rfi rfk rfn rfr rfs rie rif rii rik rin rir ris rke rkf rkk rks rni rnn rnr rns rrf rri rrk rrn rrr rrs rse rsf rsi rsk rsn rsr rss se- see sef sei sek sen ser ses sfe sff sfi sfk sfn sfr sfs sie sif sii sik sin sir sis sk- ske skf ski skk skr sks sne snf sni snk snn snr sns sr- sre srf sri srk srn srr srs ss- sse ssf ssi ssk ssn ssr sss