-er ddd dde ddi ddm ddr dds ddt de- ded dee dei dem der des det di- did die dii dim dir dis dit dmd dme dmi dmm dmr dms dmt drd dre dri drm drr drs drt dsd dse dsi dsm dsr dss dst dtd dte dti dtm dtr dts dtt ed- edd ede edi edm edr eds edt eed eee eem eer ees eet eid eie eii eim eir eis eit em- emd eme emi emm emr ems emt erd ere eri erm err ers ert es- esd ese esi esm esr ess est etd ete eti etm etr ets ett i-d idd ide idi idm idr ids idt ie- ied iee iei iem ier ies iet iid iie iii iim iir iis iit im- imd ime imi imm ims imt ir- ird ire iri irm irr irs irt is- isd ise isi ism isr iss ist itd ite iti itm its itt m-r mdd mde mdi mdm mdr mds mdt med mee mei mem mer mes met mi- mid mie mii mim mir mis mit mmd mme mmi mmm mmr mms mmt mrd mre mri mrm mrr mrs mrt msd mse msi msm msr mss mst mtd mte mti mtm mtr mts mtt rdd rde rdi rdm rdr rds rdt re- red ree rei rem rer res ret rid rie rii rim rir ris rit rmd rme rmi rmm rmr rms rmt rrd rri rrm rrr rrs rrt rsd rse rsi rsm rsr rss rst rtd rte rti rtm rtr rts rtt sdd sde sdi sdm sdr sds sdt se- sed see sei sem ser ses set sid sie sii sim sir sis sit smd sme smi smm smr sms smt sr- srd sre sri srm srr srs srt ss- ssd sse ssi ssm ssr sss sst std ste sti stm str sts stt tdd tde tdi tdm tdr tds tdt te- ted tee tei tem ter tes tet tid tie tii tim tir tis tit tmd tme tmi tmm tmr tms tmt trd tre tri trm trr trs trt tsd tse tsi tsm tsr tss tst ttd tte tti ttm ttr tts ttt