-er -ol ddd dde ddf ddl ddm ddo ddr dds de- ded dee def del dem deo der des dfd dfe dff dfl dfm dfo dfr dfs dl- dld dle dlf dll dlm dlo dlr dls dmd dme dmf dml dmm dmo dmr dms dod doe dof dol dom doo dor dos drd dre drl drm dro drr drs dsd dse dsf dsl dsm dso dsr dss ed- edd ede edf edl edm edo edr eds eed eee eef eel eem eeo eer ees ef- efd efe eff efl efm efo efr efs eld ele elf ell elm elo elr els em- emd eme emf eml emm emo emr ems eo- eod eoe eof eol eom eoo eor eos erd ere erf erl erm ero err ers es- esd ese esf esl esm eso esr ess fdd fde fdf fdl fdm fdo fdr fds fed fee fef fel fem feo fer fes ffd ffe fff ffl ffm ffo ffr ffs fld fle flf fll flm flo flr fls fmd fme fmf fml fmm fmo fmr fms foe fof fol fom foo for fos frd fre frf frl frm fro frr frs fsd fse fsf fsl fsm fso fsr fss ldd lde ldf ldl ldm ldo ldr lds led lee lef lel lem leo ler les lfd lfe lff lfl lfm lfo lfr lfs lld lle llf lll llm llo llr lls lmd lme lmf lml lmm lmo lmr lms lod loe lof lol lom loo lor los lrd lrf lrm lro lrr lrs lsd lse lsf lsl lsm lso lsr lss m-f m-o m-r mdd mde mdf mdl mdm mdo mdr mds med mee mef mel mem meo mer mes mfd mfe mff mfl mfm mfo mfr mfs mld mle mlf mll mlm mlo mlr mls mmd mme mmf mml mmm mmo mmr mms mod moe mof mol mom moo mor mos mrd mre mrf mrl mrm mro mrr mrs msd mse msf msl msm mso msr mss odd ode odf odl odm odo odr ods oed oee oef oel oem oeo oer oes of- ofd ofe off ofl ofm ofo ofr ofs old ole olf oll olm olo ols om- omd ome omf oml omm omo omr oms oo- ood oof ool oom ooo oor oos or- ord ore orf orl orm oro orr ors os- osd ose osf osl osm oso osr oss rdd rde rdf rdl rdm rdo rdr rds re- red ree ref rel rem reo rer res rfd rfe rff rfl rfm rfo rfr rfs rld rle rlf rll rlm rlo rlr rls rmd rme rmf rml rmm rmo rmr rms rod roe rof rol rom roo ror ros rrd rrf rrl rrm rrr rrs rsd rse rsf rsl rsm rso rsr rss sdd sde sdf sdl sdm sdo sdr sds se- sed see sef sel sem seo ser ses sfd sfe sff sfl sfm sfo sfr sfs sld sle slf sll slm slo slr sls smd sme smf sml smm smo smr sms sod soe sof sol som soo sor sos sr- srd sre srf srl srm sro srr srs ss- ssd sse ssf ssl ssm sso ssr sss