-er ddd dde ddf ddn ddr ddt de- ded dee def den der det dfd dfe dff dfn dfr dft dnd dne dnf dnn dnr dnt drd dre drn drr drt dtd dte dtf dtn dtr dtt ed- edd ede edf edn edr edt eed eee eef een eer eet ef- efd efe eff efr eft en- end ene enf enn enr ent erd ere erf ern err ert etd ete etf etn etr ett fdd fde fdf fdn fdr fdt fed fee fef fen fer fet ffd ffe fff ffn ffr fft fnd fne fnf fnn fnr fnt frd fre frf frn frr frt ftd fte ftf ftn ftr ftt ndd nde ndf ndn ndr ndt ne- ned nee nef nen ner net nfd nfe nff nfn nfr nft nne nnf nnn nnt nrd nre nrf nrn nrr nrt ntd nte ntf ntn ntr ntt rdd rde rdf rdn rdr rdt re- red ree ref ren rer ret rfd rfe rff rfn rfr rft rnd rnn rnr rnt rrd rrf rrn rrr rrt rtd rte rtf rtn rtr rtt tdd tde tdf tdn tdr tdt te- ted tee tef ten ter tet tfd tfe tff tfn tfr tft tnd tne tnf tnn tnr tnt trd tre trf trn trr trt ttd tte ttf ttn ttr ttt