-er ddd dde ddf ddm ddo ddr dds ddt de- ded dee def dem deo der des det dfd dfe dff dfm dfo dfr dfs dft dmd dme dmf dmm dmo dmr dms dmt dod doe dof dom doo dor dos dot drd dre drm dro drr drs drt dsd dse dsf dsm dso dsr dss dst dtd dte dtf dtm dto dtr dts dtt ed- edd ede edf edm edo edr eds edt eed eee eef eem eeo eer ees eet ef- efd efe eff efm efo efr efs eft em- emd eme emf emm emo emr ems emt eo- eod eoe eof eom eoo eor eos eot erd ere erf erm ero err ers ert es- esd ese esf esm eso esr ess est etd ete etf etm eto etr ets ett fdd fde fdf fdm fdo fdr fds fdt fed fee fef fem feo fer fes fet ffd ffe fff ffm ffo ffr ffs fft fmd fme fmf fmm fmo fmr fms fmt foe fof fom foo for fos fot frd fre frf frm fro frr frs frt fsd fse fsf fsm fso fsr fss fst ftd fte ftf ftm fto ftr fts ftt m-f m-o m-r mdd mde mdf mdm mdo mdr mds mdt med mee mef mem meo mer mes met mfd mfe mff mfm mfo mfr mfs mft mmd mme mmf mmm mmo mmr mms mmt mod moe mof mom moo mor mos mot mrd mre mrf mrm mro mrr mrs mrt msd mse msf msm mso msr mss mst mtd mte mtf mtm mto mtr mts mtt odd ode odf odm odo odr ods odt oed oee oef oem oeo oer oes oet of- ofd ofe off ofm ofo ofr ofs oft om- omd ome omf omm omo omr oms omt oo- ood oof oom ooo oor oos oot or- ord ore orf orm oro orr ors ort os- osd ose osf osm oso osr oss ost ot- otd ote otf otm oto otr ots ott rdd rde rdf rdm rdo rdr rds rdt re- red ree ref rem reo rer res ret rfd rfe rff rfm rfo rfr rfs rft rmd rme rmf rmm rmo rmr rms rmt rod roe rof rom roo ror ros rot rrd rrf rrm rrr rrs rrt rsd rse rsf rsm rso rsr rss rst rtd rte rtf rtm rto rtr rts rtt sdd sde sdf sdm sdo sdr sds sdt se- sed see sef sem seo ser ses set sfd sfe sff sfm sfo sfr sfs sft smd sme smf smm smo smr sms smt sod soe sof som soo sor sos sot sr- srd sre srf srm sro srr srs srt ss- ssd sse ssf ssm sso ssr sss sst std ste stf stm sto str sts stt tdd tde tdf tdm tdo tdr tds tdt te- ted tee tef tem teo ter tes tet tfd tfe tff tfm tfo tfr tfs tft tmd tme tmf tmm tmo tmr tms tmt to- tod toe tof tom too tor tos tot trd tre trf trm tro trr trs trt tsd tse tsf tsm tso tsr tss tst ttd tte ttf ttm tto ttr tts ttt