-er ddd dde ddm ddn ddo ddr ddx de- ded dee dem den deo der dex dmd dme dmm dmn dmo dmr dmx dnd dne dnm dnn dno dnr dod doe dom don doo dor dox drd dre drm drn dro drr drx dxd dxn dxo dxr dxx ed- edd ede edm edn edo edr edx eed eee eem een eeo eer eex em- emd eme emm emn emo emr emx en- end ene enm enn eno enr eo- eod eoe eom eon eoo eor erd ere erm ern ero err ex- exd exe exo exr exx m-o m-r mdd mde mdm mdn mdo mdr mdx med mee mem men meo mer mex mmd mme mmm mmn mmo mmr mmx mne mnm mnn mno mnr mod moe mom mon moo mor mox mrd mre mrm mrn mro mrr mrx mxd mxn mxr ndd nde ndm ndn ndo ndr ne- ned nee nem nen neo ner nex nmd nme nmm nmn nmo nmr nne nnm nnn nno no- nod noe nom non noo nor nox nrd nre nrm nrn nro nrr nrx nxd odd ode odm odn odo odr oed oee oem oen oeo oer oex om- omd ome omm omn omo omr omx on- ond one onn ono onr onx oo- ood oom oon ooo oor oox or- ord ore orm orn oro orr orx ox- oxn oxo oxx rdd rde rdm rdn rdo rdr rdx re- red ree rem ren reo rer rex rmd rme rmm rmn rmo rmr rmx rnd rnm rnn rno rnr rod roe rom ron roo ror rox rrd rrm rrn rrr rxr xde xdm xdr xed xee xem xen xer xex xmd xmm xmo xmr xmx xno xod xom xon xoo xor xox xrd xrx xxo xxx