-er ddd dde ddm ddn ddr dds de- ded dee dem den der des dmd dme dmm dmn dmr dms dnd dne dnm dnn dnr dns drd dre drm drn drr drs dsd dse dsm dsn dsr dss ed- edd ede edm edn edr eds eed eee eem een eer ees em- emd eme emm emn emr ems en- end ene enm enn enr ens erd ere erm ern err ers es- esd ese esm esn esr ess m-r mdd mde mdm mdn mdr mds med mee mem men mer mes mmd mme mmm mmn mmr mms mne mnm mnn mnr mns mrd mre mrm mrn mrr mrs msd mse msm msn msr mss ndd nde ndm ndn ndr nds ne- ned nee nem nen ner nes nmd nme nmm nmn nmr nms nne nnm nnn nns nrd nre nrm nrn nrr nrs nsd nse nsm nsn nsr nss rdd rde rdm rdn rdr rds re- red ree rem ren rer res rmd rme rmm rmn rmr rms rnd rnm rnn rnr rns rrd rrm rrn rrr rrs rsd rse rsm rsn rsr rss sdd sde sdm sdn sdr sds se- sed see sem sen ser ses smd sme smm smn smr sms snd sne snm snn snr sns sr- srd sre srm srn srr srs ss- ssd sse ssm ssn ssr sss