-er -ol ddd dde ddf ddi ddl ddo ddr ddx de- ded dee def dei del deo der dex dfd dfe dff dfi dfl dfo dfr dfx di- did die dif dii dil dio dir dix dl- dld dle dlf dli dll dlo dlr dlx dod doe dof doi dol doo dor dox drd dre dri drl dro drr drx dxd dxi dxl dxo dxr dxx ed- edd ede edf edi edl edo edr edx eed eee eef eel eeo eer eex ef- efd efe eff efi efl efo efr efx eid eie eif eii eil eio eir eix eld ele elf eli ell elo elr elx eo- eod eoe eof eoi eol eoo eor erd ere erf eri erl ero err ex- exd exe exi exl exo exr exx fdd fde fdf fdi fdl fdo fdr fdx fed fee fef fei fel feo fer fex ffd ffe fff ffi ffl ffo ffr ffx fid fie fif fii fil fir fix fld fle flf fli fll flo flr flx foe fof foi fol foo for fox frd fre frf fri frl fro frr fxe fxi fxr fxx i-d i-f idd ide idf idi idl ido idr idx ie- ied iee ief iei iel ier iex ifd ife iff ifi ifl ifo ifr ifx iid iie iif iii iil iio iir iix il- ild ile ilf ili ill ilo ilr ilx io- iod ioe iof ioi iol ioo ior ir- ird ire irf iri irl iro irr irx ixe ixi ixl ldd lde ldf ldi ldl ldo ldr led lee lef lei lel leo ler lex lfd lfe lff lfi lfl lfo lfr lfx lid lie lif lii lil lio lir lix lld lle llf lli lll llo llr lod loe lof loi lol loo lor lox lrd lrf lri lro lrr lxd lxi lxo lxr lxx o-i odd ode odf odi odl odo odr oed oee oef oei oel oeo oer oex of- ofd ofe off ofi ofl ofo ofr ofx oid oie oif oii oil oio oir old ole olf oli oll olo oo- ood oof ooi ool ooo oor oox or- ord ore orf ori orl oro orr orx ox- oxf oxi oxo oxx rdd rde rdf rdi rdl rdo rdr rdx re- red ree ref rei rel reo rer rex rfd rfe rff rfi rfl rfo rfr rid rie rif rii ril rio rir rix rld rle rlf rli rll rlo rlr rod roe rof roi rol roo ror rox rrd rrf rri rrl rrr rxr xde xdf xdi xdr xed xee xel xer xex xfe xfl xfx xie xii xio xix xld xlf xli xlr xod xof xoi xoo xor xox xrd xrf xrx xxi xxl xxo xxx