-er ddd dde ddi ddl ddr dds de- ded dee dei del der des di- did die dii dil dir dis dl- dld dle dli dll dlr dls drd dre dri drl drr drs dsd dse dsi dsl dsr dss ed- edd ede edi edl edr eds eed eee eel eer ees eid eie eii eil eir eis eld ele eli ell elr els erd ere eri erl err ers es- esd ese esi esl esr ess i-d idd ide idi idl idr ids ie- ied iee iei iel ier ies iid iie iii iil iir iis il- ild ile ili ill ilr ils ir- ird ire iri irl irr irs is- isd ise isi isl isr iss ldd lde ldi ldl ldr lds led lee lei lel ler les lid lie lii lil lir lis lld lle lli lll llr lls lrd lri lrr lrs lsd lse lsi lsl lsr lss rdd rde rdi rdl rdr rds re- red ree rei rel rer res rid rie rii ril rir ris rld rle rli rll rlr rls rrd rri rrl rrr rrs rsd rse rsi rsl rsr rss sdd sde sdi sdl sdr sds se- sed see sei sel ser ses sid sie sii sil sir sis sld sle sli sll slr sls sr- srd sre sri srl srr srs ss- ssd sse ssi ssl ssr sss