-er ddd dde ddm ddr ddt de- ded dee dem der det dmd dme dmm dmr dmt drd dre drm drr drt dtd dte dtm dtr dtt ed- edd ede edm edr edt eed eee eem eer eet em- emd eme emm emr emt erd ere erm err ert etd ete etm etr ett m-r mdd mde mdm mdr mdt med mee mem mer met mmd mme mmm mmr mmt mrd mre mrm mrr mrt mtd mte mtm mtr mtt rdd rde rdm rdr rdt re- red ree rem rer ret rmd rme rmm rmr rmt rrd rrm rrr rrt rtd rte rtm rtr rtt tdd tde tdm tdr tdt te- ted tee tem ter tet tmd tme tmm tmr tmt trd tre trm trr trt ttd tte ttm ttr ttt