-er ddd dde ddf ddi ddo ddr ddx de- ded dee def dei deo der dev dex dfd dfe dff dfi dfo dfr dfv dfx di- did die dif dii dio dir div dix dod doe dof doi doo dor dov dox drd dre dri dro drr drv drx dvd dve dvi dvr dvx dxd dxi dxo dxr dxx ed- edd ede edf edi edo edr edx eed eee eef eeo eer eev eex ef- efd efe eff efi efo efr efx eid eie eif eii eio eir eiv eix eo- eod eoe eof eoi eoo eor erd ere erf eri ero err erv evd eve evf evi evo evr evv ex- exd exe exi exo exr exx fdd fde fdf fdi fdo fdr fdx fed fee fef fei feo fer fev fex ffd ffe fff ffi ffo ffr ffv ffx fid fie fif fii fir fix foe fof foi foo for fox frd fre frf fri fro frr fvd fxe fxi fxr fxx i-d i-f i-v idd ide idf idi ido idr idv idx ie- ied iee ief iei ier iev iex ifd ife iff ifi ifo ifr ifx iid iie iif iii iio iir iix io- iod ioe iof ioi ioo ior iov ir- ird ire irf iri iro irr irv irx ivd ive ivf ivi ivo ivr ivv ivx ixe ixi o-i odd ode odf odi odo odr odv oed oee oef oei oeo oer oex of- ofd ofe off ofi ofo ofr ofv ofx oid oie oif oii oio oir oiv oo- ood oof ooi ooo oor oov oox or- ord ore orf ori oro orr orv orx ov- ovd ove ovf ovi ovo ovv ox- oxf oxi oxo oxx rdd rde rdf rdi rdo rdr rdv rdx re- red ree ref rei reo rer rev rex rfd rfe rff rfi rfo rfr rfv rid rie rif rii rio rir riv rix rod roe rof roi roo ror rov rox rrd rrf rri rrr rvd rve rvf rvi rvo rvr rvv rxr v-e vdd vde vdf vdi vdo vdr vdv vdx ved vee vef vei veo ver vex vfd vff vfi vfr vfv vi- vid vie vif vii vio vir viv vix vod voe vof voi voo vor vov vox vrd vre vrf vri vrr vvi vvo vvr vvv vxd vxr vxv xde xdf xdi xdr xdv xed xee xer xev xex xfe xfv xfx xie xii xio xiv xix xod xof xoi xoo xor xov xox xrd xrf xrx xvi xxi xxo xxv xxx