-er -ol ddd dde ddl ddo ddr de- ded dee del deo der dev dl- dld dle dll dlo dlr dlv dod doe dol doo dor dov drd dre drl dro drr drv dvd dve dvl dvr ed- edd ede edl edo edr eed eee eel eeo eer eev eld ele ell elo elr elv eo- eod eoe eol eoo eor erd ere erl ero err erv evd eve evl evo evr evv ldd lde ldl ldo ldr ldv led lee lel leo ler lev lld lle lll llo llr llv lod loe lol loo lor lov lrd lro lrr lrv lvd lve lvl lvr lvv odd ode odl odo odr odv oed oee oel oeo oer old ole oll olo oo- ood ool ooo oor oov or- ord ore orl oro orr orv ov- ovd ove ovl ovo ovv rdd rde rdl rdo rdr rdv re- red ree rel reo rer rev rld rle rll rlo rlr rod roe rol roo ror rov rrd rrl rrr rvd rve rvl rvo rvr rvv v-e vdd vde vdl vdo vdr vdv ved vee vel veo ver vl- vld vle vll vlo vlv vod voe vol voo vor vov vrd vre vrr vvo vvr vvv