-er ddd dde ddf ddi ddl ddr dds de- ded dee def dei del der des dfd dfe dff dfi dfl dfr dfs di- did die dif dii dil dir dis dl- dld dle dlf dli dll dlr dls drd dre dri drl drr drs dsd dse dsf dsi dsl dsr dss ed- edd ede edf edi edl edr eds eed eee eef eel eer ees ef- efd efe eff efi efl efr efs eid eie eif eii eil eir eis eld ele elf eli ell elr els erd ere erf eri erl err ers es- esd ese esf esi esl esr ess fdd fde fdf fdi fdl fdr fds fed fee fef fei fel fer fes ffd ffe fff ffi ffl ffr ffs fid fie fif fii fil fir fis fld fle flf fli fll flr fls frd fre frf fri frl frr frs fsd fse fsf fsi fsl fsr fss i-d i-f idd ide idf idi idl idr ids ie- ied iee ief iei iel ier ies ifd ife iff ifi ifl ifr ifs iid iie iif iii iil iir iis il- ild ile ilf ili ill ilr ils ir- ird ire irf iri irl irr irs is- isd ise isf isi isl isr iss ldd lde ldf ldi ldl ldr lds led lee lef lei lel ler les lfd lfe lff lfi lfl lfr lfs lid lie lif lii lil lir lis lld lle llf lli lll llr lls lrd lrf lri lrr lrs lsd lse lsf lsi lsl lsr lss rdd rde rdf rdi rdl rdr rds re- red ree ref rei rel rer res rfd rfe rff rfi rfl rfr rfs rid rie rif rii ril rir ris rld rle rlf rli rll rlr rls rrd rrf rri rrl rrr rrs rsd rse rsf rsi rsl rsr rss sdd sde sdf sdi sdl sdr sds se- sed see sef sei sel ser ses sfd sfe sff sfi sfl sfr sfs sid sie sif sii sil sir sis sld sle slf sli sll slr sls sr- srd sre srf sri srl srr srs ss- ssd sse ssf ssi ssl ssr sss