-er -ol ddd dde ddl ddo ddr ddx de- ded dee del deo der dex dl- dld dle dll dlo dlr dlx dod doe dol doo dor dox drd dre drl dro drr drx dxd dxl dxo dxr dxx ed- edd ede edl edo edr edx eed eee eel eeo eer eex eld ele ell elo elr elx eo- eod eoe eol eoo eor erd ere erl ero err ex- exd exe exl exo exr exx ldd lde ldl ldo ldr led lee lel leo ler lex lld lle lll llo llr lod loe lol loo lor lox lrd lro lrr lxd lxo lxr lxx odd ode odl odo odr oed oee oel oeo oer oex old ole oll olo oo- ood ool ooo oor oox or- ord ore orl oro orr orx ox- oxo oxx rdd rde rdl rdo rdr rdx re- red ree rel reo rer rex rld rle rll rlo rlr rod roe rol roo ror rox rrd rrl rrr rxr xde xdr xed xee xel xer xex xld xlr xod xoo xor xox xrd xrx xxl xxo xxx