-er -ol ddd dde ddf ddl ddo ddr de- ded dee def del deo der dfd dfe dff dfl dfo dfr dl- dld dle dlf dll dlo dlr dod doe dof dol doo dor drd dre drl dro drr ed- edd ede edf edl edo edr eed eee eef eel eeo eer ef- efd efe eff efl efo efr eld ele elf ell elo elr eo- eod eoe eof eol eoo eor erd ere erf erl ero err fdd fde fdf fdl fdo fdr fed fee fef fel feo fer ffd ffe fff ffl ffo ffr fld fle flf fll flo flr foe fof fol foo for frd fre frf frl fro frr ldd lde ldf ldl ldo ldr led lee lef lel leo ler lfd lfe lff lfl lfo lfr lld lle llf lll llo llr lod loe lof lol loo lor lrd lrf lro lrr odd ode odf odl odo odr oed oee oef oel oeo oer of- ofd ofe off ofl ofo ofr old ole olf oll olo oo- ood oof ool ooo oor or- ord ore orf orl oro orr rdd rde rdf rdl rdo rdr re- red ree ref rel reo rer rfd rfe rff rfl rfo rfr rld rle rlf rll rlo rlr rod roe rof rol roo ror rrd rrf rrl rrr