-er ddd dde ddm ddr ddt ddu ddx de- ded dee dem der det deu dex dmd dme dmm dmr dmt dmu dmx drd dre drm drr drt dru drx dtd dte dtm dtr dtt dtu dtx dud due dum dur dut dux dxd dxr dxt dxx ed- edd ede edm edr edt edu edx eed eee eem eer eet eex em- emd eme emm emr emt emu emx erd ere erm err ert eru etd ete etm etr ett etu etx eu- eud eue eur eut eux ex- exd exe exr ext exu exx m-r mdd mde mdm mdr mdt mdu mdx med mee mem mer met meu mex mmd mme mmm mmr mmt mmu mmx mrd mre mrm mrr mrt mru mrx mtd mte mtm mtr mtt mtu mtx mud mue mum mur mut muu mux mxd mxr mxu rdd rde rdm rdr rdt rdu rdx re- red ree rem rer ret reu rex rmd rme rmm rmr rmt rmx rrd rrm rrr rrt rru rtd rte rtm rtr rtt rtu rtx rud rue rum rur rut ruu rux rxr t-x tdd tde tdm tdr tdt tdu tdx te- ted tee tem ter tet teu tex tmd tme tmm tmr tmt tmu tmx trd tre trm trr trt tru trx ttd tte ttm ttr ttt ttu ttx tud tue tum tur tut tuu tux txe txt txu udd ude udm udr udt udu udx ued uee uem uer uet um- umd ume umm umr umt umu ur- urd ure urm urr urt uru urx utd ute utm utr utt utu utx uue uum uur uut uuu uxr uxt uxu xde xdm xdr xdt xed xee xem xer xet xeu xex xmd xmm xmr xmt xmu xmx xrd xrt xrx xtm xtr xtx xue xxx