-er ddd dde ddf ddm ddn ddr de- ded dee def dem den der dfd dfe dff dfm dfn dfr dmd dme dmf dmm dmn dmr dnd dne dnf dnm dnn dnr drd dre drm drn drr ed- edd ede edf edm edn edr eed eee eef eem een eer ef- efd efe eff efm efr em- emd eme emf emm emn emr en- end ene enf enm enn enr erd ere erf erm ern err fdd fde fdf fdm fdn fdr fed fee fef fem fen fer ffd ffe fff ffm ffn ffr fmd fme fmf fmm fmn fmr fnd fne fnf fnm fnn fnr frd fre frf frm frn frr m-f m-r mdd mde mdf mdm mdn mdr med mee mef mem men mer mfd mfe mff mfm mfn mfr mmd mme mmf mmm mmn mmr mne mnf mnm mnn mnr mrd mre mrf mrm mrn mrr ndd nde ndf ndm ndn ndr ne- ned nee nef nem nen ner nfd nfe nff nfn nfr nmd nme nmm nmn nmr nne nnf nnm nnn nrd nre nrf nrm nrn nrr rdd rde rdf rdm rdn rdr re- red ree ref rem ren rer rfd rfe rff rfm rfn rfr rmd rme rmf rmm rmn rmr rnd rnm rnn rnr rrd rrf rrm rrn rrr