-er ddd dde ddf ddm ddo ddp ddr dds de- ded dee def dem deo dep der des dfd dfe dff dfm dfo dfp dfr dfs dmd dme dmf dmm dmo dmp dmr dms dod doe dof dom doo dop dor dos dpd dpe dpf dpm dpo dpp dpr dps drd dre drm dro drp drr drs dsd dse dsf dsm dso dsp dsr dss ed- edd ede edf edm edo edp edr eds eed eee eef eem eeo eep eer ees ef- efd efe eff efm efo efp efr efs em- emd eme emf emm emo emp emr ems eo- eod eoe eof eom eoo eop eor eos ep- epd epe epf epm epo epp epr eps erd ere erf erm ero erp err ers es- esd ese esf esm eso esp esr ess fdd fde fdf fdm fdo fdp fdr fds fed fee fef fem feo fep fer fes ffd ffe fff ffm ffo ffp ffr ffs fmd fme fmf fmm fmo fmp fmr fms foe fof fom foo fop for fos fpd fpe fpm fpo fpp fpr fps frd fre frf frm fro frp frr frs fsd fse fsf fsm fso fsp fsr fss m-f m-o m-r mdd mde mdf mdm mdo mdp mdr mds med mee mef mem meo mep mer mes mfd mfe mff mfm mfo mfp mfr mfs mmd mme mmf mmm mmo mmp mmr mms mod moe mof mom moo mop mor mos mpd mpe mpf mpm mpo mpp mpr mps mrd mre mrf mrm mro mrp mrr mrs msd mse msf msm mso msp msr mss odd ode odf odm odo odp odr ods oed oee oef oem oeo oep oer oes of- ofd ofe off ofm ofo ofp ofr ofs om- omd ome omf omm omo omp omr oms oo- ood oof oom ooo oop oor oos op- opd ope opf opm opo opp opr ops or- ord ore orf orm oro orp orr ors os- osd ose osf osm oso osp osr oss p-p pdd pde pdf pdm pdo pdp pdr pds ped pee pef pem peo pep per pes pfd pfe pff pfm pfo pfp pfr pfs pmd pme pmf pmm pmo pmp pmr pms pod poe pof pom poo pop por pos ppd ppe ppf ppm ppo ppp ppr pps prd pre prf prm pro prp prr prs ps- psd pse psf psm pso psp psr pss rdd rde rdf rdm rdo rdp rdr rds re- red ree ref rem reo rep rer res rfd rfe rff rfm rfo rfp rfr rfs rmd rme rmf rmm rmo rmp rmr rms rod roe rof rom roo rop ror ros rpd rpe rpf rpm rpo rpp rpr rps rrd rrf rrm rrp rrr rrs rsd rse rsf rsm rso rsp rsr rss sdd sde sdf sdm sdo sdp sdr sds se- sed see sef sem seo sep ser ses sfd sfe sff sfm sfo sfp sfr sfs smd sme smf smm smo smp smr sms sod soe sof som soo sop sor sos spd spe spf spm spo spp spr sps sr- srd sre srf srm sro srp srr srs ss- ssd sse ssf ssm sso ssp ssr sss