-er -ol ddd dde ddf ddk ddl ddo ddr de- ded dee def dek del deo der dfd dfe dff dfk dfl dfo dfr dke dkk dkl dko dkr dl- dld dle dlf dlk dll dlo dlr dod doe dof dok dol doo dor drd dre drk drl dro drr ed- edd ede edf edk edl edo edr eed eee eef eek eel eeo eer ef- efd efe eff efl efo efr ekd eke ekf ekl eko ekr eld ele elf elk ell elo elr eo- eod eoe eof eok eol eoo eor erd ere erf erk erl ero err fdd fde fdf fdk fdl fdo fdr fed fee fef fek fel feo fer ffd ffe fff ffk ffl ffo ffr fkf fkk fkl fld fle flf fll flo flr foe fof fok fol foo for frd fre frf frk frl fro frr kde kdf kdk kdl kdo kdr ke- ked kee kef kek kel keo ker kfd kff kfo kke kkk kkl kkr kl- kld klf klo klr kod koe kof kok kol koo kor krd krf krk krl kro krr ldd lde ldf ldk ldl ldo ldr led lee lef lek lel leo ler lfd lfe lff lfk lfl lfo lfr lkl lkr lld lle llf llk lll llo llr lod loe lof lok lol loo lor lrd lrf lrk lro lrr odd ode odf odl odo odr oed oee oef oel oeo oer of- ofd ofe off ofl ofo ofr okd oke okk okl oko okr old ole olf olk oll olo oo- ood oof ook ool ooo oor or- ord ore orf ork orl oro orr rdd rde rdf rdl rdo rdr re- red ree ref rek rel reo rer rfd rfe rff rfk rfl rfo rfr rke rkf rkk rko rld rle rlf rll rlo rlr rod roe rof rok rol roo ror rrd rrf rrk rrl rrr