-er ddd dde ddf ddm ddo ddr de- ded dee def dem deo der dev dfd dfe dff dfm dfo dfr dfv dmd dme dmf dmm dmo dmr dmv dod doe dof dom doo dor dov drd dre drm dro drr drv dvd dve dvm dvr ed- edd ede edf edm edo edr eed eee eef eem eeo eer eev ef- efd efe eff efm efo efr em- emd eme emf emm emo emr emv eo- eod eoe eof eom eoo eor erd ere erf erm ero err erv evd eve evf evm evo evr evv fdd fde fdf fdm fdo fdr fed fee fef fem feo fer fev ffd ffe fff ffm ffo ffr ffv fmd fme fmf fmm fmo fmr fmv foe fof fom foo for frd fre frf frm fro frr fvd m-f m-o m-r m-v mdd mde mdf mdm mdo mdr mdv med mee mef mem meo mer mev mfd mfe mff mfm mfo mfr mfv mmd mme mmf mmm mmo mmr mmv mod moe mof mom moo mor mov mrd mre mrf mrm mro mrr mrv mvd mve mvf mvm mvo mvr mvv odd ode odf odm odo odr odv oed oee oef oem oeo oer of- ofd ofe off ofm ofo ofr ofv om- omd ome omf omm omo omr omv oo- ood oof oom ooo oor oov or- ord ore orf orm oro orr orv ov- ovd ove ovf ovo ovv rdd rde rdf rdm rdo rdr rdv re- red ree ref rem reo rer rev rfd rfe rff rfm rfo rfr rfv rmd rme rmf rmm rmo rmr rmv rod roe rof rom roo ror rov rrd rrf rrm rrr rvd rve rvf rvm rvo rvr rvv v-e vdd vde vdf vdm vdo vdr vdv ved vee vef vem veo ver vfd vff vfm vfr vfv vm- vmd vmf vmm vmo vmr vod voe vof vom voo vor vov vrd vre vrf vrm vrr vvm vvo vvr vvv