-er ddd dde ddf ddi ddk ddn ddr dds de- ded dee def dei dek den der des dfd dfe dff dfi dfk dfn dfr dfs di- did die dif dii dik din dir dis dke dki dkk dkr dks dnd dne dnf dni dnk dnn dnr dns drd dre dri drk drn drr drs dsd dse dsf dsi dsk dsn dsr dss ed- edd ede edf edi edk edn edr eds eed eee eef eek een eer ees ef- efd efe eff efi efr efs eid eie eif eii eik ein eir eis ekd eke ekf eki ekr eks en- end ene enf eni enk enn enr ens erd ere erf eri erk ern err ers es- esd ese esf esi esk esn esr ess fdd fde fdf fdi fdk fdn fdr fds fed fee fef fei fek fen fer fes ffd ffe fff ffi ffk ffn ffr ffs fid fie fif fii fik fin fir fis fkf fki fkk fnd fne fnf fni fnk fnn fnr fns frd fre frf fri frk frn frr frs fsd fse fsf fsi fsk fsn fsr fss i-d i-f idd ide idf idi idk idn idr ids ie- ied iee ief iei iek ien ier ies ifd ife iff ifi ifn ifr ifs iid iie iif iii iin iir iis ike ikf iki ikk ikr iks in- ind ine inf ini ink inn inr ins ir- ird ire irf iri irk irn irr irs is- isd ise isf isi isk isn isr iss kde kdf kdk kdr kds ke- ked kee kef kei kek ken ker kes kfd kff kfi kfs kid kie kif kii kik kin kir kis kke kki kkk kkn kkr kks kn- knd kne knf kni knk knn knr krd krf kri krk krn krr krs ksd kse ksf ksi ksk ksn ksr kss n-i ndd nde ndf ndi ndk ndn ndr nds ne- ned nee nef nei nek nen ner nes nfd nfe nff nfi nfk nfn nfr nfs nid nie nif nii nik nin nir nis nke nkf nki nkk nkn nkr nks nne nnf nni nnk nnn nns nrd nre nrf nri nrk nrn nrr nrs nsd nse nsf nsi nsk nsn nsr nss rdd rde rdf rdi rdn rdr rds re- red ree ref rei rek ren rer res rfd rfe rff rfi rfk rfn rfr rfs rid rie rif rii rik rin rir ris rke rkf rkk rks rnd rni rnn rnr rns rrd rrf rri rrk rrn rrr rrs rsd rse rsf rsi rsk rsn rsr rss sdd sde sdf sdi sdk sdn sdr sds se- sed see sef sei sek sen ser ses sfd sfe sff sfi sfk sfn sfr sfs sid sie sif sii sik sin sir sis sk- skd ske skf ski skk skr sks snd sne snf sni snk snn snr sns sr- srd sre srf sri srk srn srr srs ss- ssd sse ssf ssi ssk ssn ssr sss