-er ddd dde ddf ddi ddl ddr dds ddx de- ded dee def dei del der des dev dex dfd dfe dff dfi dfl dfr dfs dfv dfx di- did die dif dii dil dir dis div dix dl- dld dle dlf dli dll dlr dls dlv dlx drd dre dri drl drr drs drv drx dsd dse dsf dsi dsl dsr dss dsv dsx dvd dve dvi dvl dvr dvs dvx dxd dxi dxl dxr dxs dxx ed- edd ede edf edi edl edr eds edx eed eee eef eel eer ees eev eex ef- efd efe eff efi efl efr efs efx eid eie eif eii eil eir eis eiv eix eld ele elf eli ell elr els elv elx erd ere erf eri erl err ers erv es- esd ese esf esi esl esr ess esv esx evd eve evf evi evl evr evs evv ex- exd exe exi exl exr exs exx fdd fde fdf fdi fdl fdr fds fdx fed fee fef fei fel fer fes fev fex ffd ffe fff ffi ffl ffr ffs ffv ffx fid fie fif fii fil fir fis fix fld fle flf fli fll flr fls flx frd fre frf fri frl frr frs fsd fse fsf fsi fsl fsr fss fsv fsx fvd fxe fxi fxr fxs fxx i-d i-f i-v idd ide idf idi idl idr ids idv idx ie- ied iee ief iei iel ier ies iev iex ifd ife iff ifi ifl ifr ifs ifx iid iie iif iii iil iir iis iix il- ild ile ilf ili ill ilr ils ilv ilx ir- ird ire irf iri irl irr irs irv irx is- isd ise isf isi isl isr iss isv ivd ive ivf ivi ivl ivr ivs ivv ivx ixe ixi ixl ldd lde ldf ldi ldl ldr lds ldv led lee lef lei lel ler les lev lex lfd lfe lff lfi lfl lfr lfs lfx lid lie lif lii lil lir lis liv lix lld lle llf lli lll llr lls llv lrd lrf lri lrr lrs lrv lsd lse lsf lsi lsl lsr lss lsv lvd lve lvf lvi lvl lvr lvs lvv lvx lxd lxi lxr lxv lxx rdd rde rdf rdi rdl rdr rds rdv rdx re- red ree ref rei rel rer res rev rex rfd rfe rff rfi rfl rfr rfs rfv rid rie rif rii ril rir ris riv rix rld rle rlf rli rll rlr rls rrd rrf rri rrl rrr rrs rsd rse rsf rsi rsl rsr rss rsv rsx rvd rve rvf rvi rvl rvr rvs rvv rxr rxs sdd sde sdf sdi sdl sdr sds sdv se- sed see sef sei sel ser ses sev sex sfd sfe sff sfi sfl sfr sfs sfv sfx sid sie sif sii sil sir sis siv six sld sle slf sli sll slr sls slv slx sr- srd sre srf sri srl srr srs srv srx ss- ssd sse ssf ssi ssl ssr sss ssv ssx svd sve svf svi svl svr svs svv svx sxi sxl sxs v-e vdd vde vdf vdi vdl vdr vds vdv vdx ved vee vef vei vel ver ves vex vfd vff vfi vfl vfr vfs vfv vi- vid vie vif vii vil vir vis viv vix vl- vld vle vlf vll vls vlv vrd vre vrf vri vrr vrs vsd vse vsf vsi vsl vsr vss vsv vvi vvr vvs vvv vxd vxl vxr vxs vxv xde xdf xdi xdr xds xdv xed xee xel xer xes xev xex xfe xfl xfs xfv xfx xie xii xis xiv xix xld xlf xli xlr xls xlv xrd xrf xrx xsi xsl xss xvi xvl xxi xxl xxv xxx