-er -ol ddd dde ddf ddi ddk ddl ddo ddr de- ded dee def dei dek del deo der dfd dfe dff dfi dfk dfl dfo dfr di- did die dif dii dik dil dio dir dke dki dkk dkl dko dkr dl- dld dle dlf dli dlk dll dlo dlr dod doe dof doi dok dol doo dor drd dre dri drk drl dro drr ed- edd ede edf edi edk edl edo edr eed eee eef eek eel eeo eer ef- efd efe eff efi efl efo efr eid eie eif eii eik eil eio eir ekd eke ekf eki ekl eko ekr eld ele elf eli elk ell elo elr eo- eod eoe eof eoi eok eol eoo eor erd ere erf eri erk erl ero err fdd fde fdf fdi fdk fdl fdo fdr fed fee fef fei fek fel feo fer ffd ffe fff ffi ffk ffl ffo ffr fid fie fif fii fik fil fir fkf fki fkk fkl fld fle flf fli fll flo flr foe fof foi fok fol foo for frd fre frf fri frk frl fro frr i-d i-f idd ide idf idi idk idl ido idr ie- ied iee ief iei iek iel ier ifd ife iff ifi ifl ifo ifr iid iie iif iii iil iio iir ike ikf iki ikk ikl iko ikr il- ild ile ilf ili ilk ill ilo ilr io- iod ioe iof ioi iol ioo ior ir- ird ire irf iri irk irl iro irr kde kdf kdk kdl kdo kdr ke- ked kee kef kei kek kel keo ker kfd kff kfi kfo kid kie kif kii kik kil kio kir kke kki kkk kkl kkr kl- kld klf kli klo klr kod koe kof koi kok kol koo kor krd krf kri krk krl kro krr ldd lde ldf ldi ldk ldl ldo ldr led lee lef lei lek lel leo ler lfd lfe lff lfi lfk lfl lfo lfr lid lie lif lii lik lil lio lir lkl lkr lld lle llf lli llk lll llo llr lod loe lof loi lok lol loo lor lrd lrf lri lrk lro lrr o-i odd ode odf odi odl odo odr oed oee oef oei oel oeo oer of- ofd ofe off ofi ofl ofo ofr oid oie oif oii oik oil oio oir okd oke oki okk okl oko okr old ole olf oli olk oll olo oo- ood oof ooi ook ool ooo oor or- ord ore orf ori ork orl oro orr rdd rde rdf rdi rdl rdo rdr re- red ree ref rei rek rel reo rer rfd rfe rff rfi rfk rfl rfo rfr rid rie rif rii rik ril rio rir rke rkf rkk rko rld rle rlf rli rll rlo rlr rod roe rof roi rok rol roo ror rrd rrf rri rrk rrl rrr