-er ddd dde ddf ddi ddl ddr ddx de- ded dee def dei del der dev dex dfd dfe dff dfi dfl dfr dfv dfx di- did die dif dii dil dir div dix dl- dld dle dlf dli dll dlr dlv dlx drd dre dri drl drr drv drx dvd dve dvi dvl dvr dvx dxd dxi dxl dxr dxx ed- edd ede edf edi edl edr edx eed eee eef eel eer eev eex ef- efd efe eff efi efl efr efx eid eie eif eii eil eir eiv eix eld ele elf eli ell elr elv elx erd ere erf eri erl err erv evd eve evf evi evl evr evv ex- exd exe exi exl exr exx fdd fde fdf fdi fdl fdr fdx fed fee fef fei fel fer fev fex ffd ffe fff ffi ffl ffr ffv ffx fid fie fif fii fil fir fix fld fle flf fli fll flr flx frd fre frf fri frl frr fvd fxe fxi fxr fxx i-d i-f i-v idd ide idf idi idl idr idv idx ie- ied iee ief iei iel ier iev iex ifd ife iff ifi ifl ifr ifx iid iie iif iii iil iir iix il- ild ile ilf ili ill ilr ilv ilx ir- ird ire irf iri irl irr irv irx ivd ive ivf ivi ivl ivr ivv ivx ixe ixi ixl ldd lde ldf ldi ldl ldr ldv led lee lef lei lel ler lev lex lfd lfe lff lfi lfl lfr lfx lid lie lif lii lil lir liv lix lld lle llf lli lll llr llv lrd lrf lri lrr lrv lvd lve lvf lvi lvl lvr lvv lvx lxd lxi lxr lxv lxx rdd rde rdf rdi rdl rdr rdv rdx re- red ree ref rei rel rer rev rex rfd rfe rff rfi rfl rfr rfv rid rie rif rii ril rir riv rix rld rle rlf rli rll rlr rrd rrf rri rrl rrr rvd rve rvf rvi rvl rvr rvv rxr v-e vdd vde vdf vdi vdl vdr vdv vdx ved vee vef vei vel ver vex vfd vff vfi vfl vfr vfv vi- vid vie vif vii vil vir viv vix vl- vld vle vlf vll vlv vrd vre vrf vri vrr vvi vvr vvv vxd vxl vxr vxv xde xdf xdi xdr xdv xed xee xel xer xev xex xfe xfl xfv xfx xie xii xiv xix xld xlf xli xlr xlv xrd xrf xrx xvi xvl xxi xxl xxv xxx