-er ddd dde ddi ddl ddr dds ddt de- ded dee dei del der des det di- did die dii dil dir dis dit dl- dld dle dli dll dlr dls dlt drd dre dri drl drr drs drt dsd dse dsi dsl dsr dss dst dtd dte dti dtl dtr dts dtt ed- edd ede edi edl edr eds edt eed eee eel eer ees eet eid eie eii eil eir eis eit eld ele eli ell elr els elt erd ere eri erl err ers ert es- esd ese esi esl esr ess est etd ete eti etl etr ets ett i-d idd ide idi idl idr ids idt ie- ied iee iei iel ier ies iet iid iie iii iil iir iis iit il- ild ile ili ill ilr ils ilt ir- ird ire iri irl irr irs irt is- isd ise isi isl isr iss ist itd ite iti itl its itt ldd lde ldi ldl ldr lds ldt led lee lei lel ler les let lid lie lii lil lir lis lit lld lle lli lll llr lls llt lrd lri lrr lrs lrt lsd lse lsi lsl lsr lss lst ltd lte lti ltl ltr lts ltt rdd rde rdi rdl rdr rds rdt re- red ree rei rel rer res ret rid rie rii ril rir ris rit rld rle rli rll rlr rls rlt rrd rri rrl rrr rrs rrt rsd rse rsi rsl rsr rss rst rtd rte rti rtl rtr rts rtt sdd sde sdi sdl sdr sds sdt se- sed see sei sel ser ses set sid sie sii sil sir sis sit sld sle sli sll slr sls slt sr- srd sre sri srl srr srs srt ss- ssd sse ssi ssl ssr sss sst std ste sti stl str sts stt tdd tde tdi tdl tdr tds tdt te- ted tee tei tel ter tes tet tid tie tii til tir tis tit tld tle tli tll tlr tls tlt trd tre tri trl trr trs trt tsd tse tsi tsl tsr tss tst ttd tte tti ttl ttr tts ttt