-er ddd dde ddf ddm ddr dds ddu de- ded dee def dem der des deu dfd dfe dff dfm dfr dfs dfu dmd dme dmf dmm dmr dms dmu drd dre drm drr drs dru dsd dse dsf dsm dsr dss dsu dud due duf dum dur dus ed- edd ede edf edm edr eds edu eed eee eef eem eer ees ef- efd efe eff efm efr efs em- emd eme emf emm emr ems emu erd ere erf erm err ers eru es- esd ese esf esm esr ess esu eu- eud eue euf eur eus fdd fde fdf fdm fdr fds fdu fed fee fef fem fer fes feu ffd ffe fff ffm ffr ffs ffu fmd fme fmf fmm fmr fms fmu frd fre frf frm frr frs fru fsd fse fsf fsm fsr fss fsu fud fue fuf fum fur fus fuu m-f m-r mdd mde mdf mdm mdr mds mdu med mee mef mem mer mes meu mfd mfe mff mfm mfr mfs mfu mmd mme mmf mmm mmr mms mmu mrd mre mrf mrm mrr mrs mru msd mse msf msm msr mss msu mud mue muf mum mur mus muu rdd rde rdf rdm rdr rds rdu re- red ree ref rem rer res reu rfd rfe rff rfm rfr rfs rfu rmd rme rmf rmm rmr rms rrd rrf rrm rrr rrs rru rsd rse rsf rsm rsr rss rsu rud rue ruf rum rur rus ruu sdd sde sdf sdm sdr sds sdu se- sed see sef sem ser ses seu sfd sfe sff sfm sfr sfs sfu smd sme smf smm smr sms smu sr- srd sre srf srm srr srs ss- ssd sse ssf ssm ssr sss ssu sud sue suf sum sur sus suu udd ude udf udm udr uds udu ued uee uef uem uer ues ufd ufe uff ufm ufr ufs ufu um- umd ume umf umm umr ums umu ur- urd ure urf urm urr urs uru usd use usf usm usr uss usu uue uum uur uus uuu