-er ddd dde ddf ddi ddm ddo ddr dds ddt de- ded dee def dei dem deo der des det dfd dfe dff dfi dfm dfo dfr dfs dft di- did die dif dii dim dio dir dis dit dmd dme dmf dmi dmm dmo dmr dms dmt dod doe dof doi dom doo dor dos dot drd dre dri drm dro drr drs drt dsd dse dsf dsi dsm dso dsr dss dst dtd dte dtf dti dtm dto dtr dts dtt ed- edd ede edf edi edm edo edr eds edt eed eee eef eem eeo eer ees eet ef- efd efe eff efi efm efo efr efs eft eid eie eif eii eim eio eir eis eit em- emd eme emf emi emm emo emr ems emt eo- eod eoe eof eoi eom eoo eor eos eot erd ere erf eri erm ero err ers ert es- esd ese esf esi esm eso esr ess est etd ete etf eti etm eto etr ets ett fdd fde fdf fdi fdm fdo fdr fds fdt fed fee fef fei fem feo fer fes fet ffd ffe fff ffi ffm ffo ffr ffs fft fid fie fif fii fim fir fis fit fmd fme fmf fmi fmm fmo fmr fms fmt foe fof foi fom foo for fos fot frd fre frf fri frm fro frr frs frt fsd fse fsf fsi fsm fso fsr fss fst ftd fte ftf fti ftm fto ftr fts ftt i-d i-f idd ide idf idi idm ido idr ids idt ie- ied iee ief iei iem ier ies iet ifd ife iff ifi ifm ifo ifr ifs ift iid iie iif iii iim iio iir iis iit im- imd ime imf imi imm imo ims imt io- iod ioe iof ioi iom ioo ior ios iot ir- ird ire irf iri irm iro irr irs irt is- isd ise isf isi ism iso isr iss ist itd ite itf iti itm ito its itt m-f m-o m-r mdd mde mdf mdi mdm mdo mdr mds mdt med mee mef mei mem meo mer mes met mfd mfe mff mfi mfm mfo mfr mfs mft mi- mid mie mif mii mim mio mir mis mit mmd mme mmf mmi mmm mmo mmr mms mmt mod moe mof moi mom moo mor mos mot mrd mre mrf mri mrm mro mrr mrs mrt msd mse msf msi msm mso msr mss mst mtd mte mtf mti mtm mto mtr mts mtt o-i odd ode odf odi odm odo odr ods odt oed oee oef oei oem oeo oer oes oet of- ofd ofe off ofi ofm ofo ofr ofs oft oid oie oif oii oim oio oir ois oit om- omd ome omf omi omm omo omr oms omt oo- ood oof ooi oom ooo oor oos oot or- ord ore orf ori orm oro orr ors ort os- osd ose osf osi osm oso osr oss ost ot- otd ote otf oti otm oto otr ots ott rdd rde rdf rdi rdm rdo rdr rds rdt re- red ree ref rei rem reo rer res ret rfd rfe rff rfi rfm rfo rfr rfs rft rid rie rif rii rim rio rir ris rit rmd rme rmf rmi rmm rmo rmr rms rmt rod roe rof roi rom roo ror ros rot rrd rrf rri rrm rrr rrs rrt rsd rse rsf rsi rsm rso rsr rss rst rtd rte rtf rti rtm rto rtr rts rtt sdd sde sdf sdi sdm sdo sdr sds sdt se- sed see sef sei sem seo ser ses set sfd sfe sff sfi sfm sfo sfr sfs sft sid sie sif sii sim sio sir sis sit smd sme smf smi smm smo smr sms smt sod soe sof soi som soo sor sos sot sr- srd sre srf sri srm sro srr srs srt ss- ssd sse ssf ssi ssm sso ssr sss sst std ste stf sti stm sto str sts stt tdd tde tdf tdi tdm tdo tdr tds tdt te- ted tee tef tei tem teo ter tes tet tfd tfe tff tfi tfm tfo tfr tfs tft tid tie tif tii tim tio tir tis tit tmd tme tmf tmi tmm tmo tmr tms tmt to- tod toe tof toi tom too tor tos tot trd tre trf tri trm tro trr trs trt tsd tse tsf tsi tsm tso tsr tss tst ttd tte ttf tti ttm tto ttr tts ttt