-er ddd dde ddf ddi ddm ddr dds de- ded dee def dei dem der des dfd dfe dff dfi dfm dfr dfs di- did die dif dii dim dir dis dmd dme dmf dmi dmm dmr dms drd dre dri drm drr drs dsd dse dsf dsi dsm dsr dss ed- edd ede edf edi edm edr eds eed eee eef eem eer ees ef- efd efe eff efi efm efr efs eid eie eif eii eim eir eis em- emd eme emf emi emm emr ems erd ere erf eri erm err ers es- esd ese esf esi esm esr ess fdd fde fdf fdi fdm fdr fds fed fee fef fei fem fer fes ffd ffe fff ffi ffm ffr ffs fid fie fif fii fim fir fis fmd fme fmf fmi fmm fmr fms frd fre frf fri frm frr frs fsd fse fsf fsi fsm fsr fss i-d i-f idd ide idf idi idm idr ids ie- ied iee ief iei iem ier ies ifd ife iff ifi ifm ifr ifs iid iie iif iii iim iir iis im- imd ime imf imi imm ims ir- ird ire irf iri irm irr irs is- isd ise isf isi ism isr iss m-f m-r mdd mde mdf mdi mdm mdr mds med mee mef mei mem mer mes mfd mfe mff mfi mfm mfr mfs mi- mid mie mif mii mim mir mis mmd mme mmf mmi mmm mmr mms mrd mre mrf mri mrm mrr mrs msd mse msf msi msm msr mss rdd rde rdf rdi rdm rdr rds re- red ree ref rei rem rer res rfd rfe rff rfi rfm rfr rfs rid rie rif rii rim rir ris rmd rme rmf rmi rmm rmr rms rrd rrf rri rrm rrr rrs rsd rse rsf rsi rsm rsr rss sdd sde sdf sdi sdm sdr sds se- sed see sef sei sem ser ses sfd sfe sff sfi sfm sfr sfs sid sie sif sii sim sir sis smd sme smf smi smm smr sms sr- srd sre srf sri srm srr srs ss- ssd sse ssf ssi ssm ssr sss