-er ddd dde ddf ddn ddr dds ddt de- ded dee def den der des det dfd dfe dff dfn dfr dfs dft dnd dne dnf dnn dnr dns dnt drd dre drn drr drs drt dsd dse dsf dsn dsr dss dst dtd dte dtf dtn dtr dts dtt ed- edd ede edf edn edr eds edt eed eee eef een eer ees eet ef- efd efe eff efr efs eft en- end ene enf enn enr ens ent erd ere erf ern err ers ert es- esd ese esf esn esr ess est etd ete etf etn etr ets ett fdd fde fdf fdn fdr fds fdt fed fee fef fen fer fes fet ffd ffe fff ffn ffr ffs fft fnd fne fnf fnn fnr fns fnt frd fre frf frn frr frs frt fsd fse fsf fsn fsr fss fst ftd fte ftf ftn ftr fts ftt ndd nde ndf ndn ndr nds ndt ne- ned nee nef nen ner nes net nfd nfe nff nfn nfr nfs nft nne nnf nnn nns nnt nrd nre nrf nrn nrr nrs nrt nsd nse nsf nsn nsr nss nst ntd nte ntf ntn ntr nts ntt rdd rde rdf rdn rdr rds rdt re- red ree ref ren rer res ret rfd rfe rff rfn rfr rfs rft rnd rnn rnr rns rnt rrd rrf rrn rrr rrs rrt rsd rse rsf rsn rsr rss rst rtd rte rtf rtn rtr rts rtt sdd sde sdf sdn sdr sds sdt se- sed see sef sen ser ses set sfd sfe sff sfn sfr sfs sft snd sne snf snn snr sns snt sr- srd sre srf srn srr srs srt ss- ssd sse ssf ssn ssr sss sst std ste stf stn str sts stt tdd tde tdf tdn tdr tds tdt te- ted tee tef ten ter tes tet tfd tfe tff tfn tfr tfs tft tnd tne tnf tnn tnr tns tnt trd tre trf trn trr trs trt tsd tse tsf tsn tsr tss tst ttd tte ttf ttn ttr tts ttt