-er ddd dde ddk ddm ddo ddr dds de- ded dee dek dem deo der des dke dkk dkm dko dkr dks dmd dme dmk dmm dmo dmr dms dod doe dok dom doo dor dos drd dre drk drm dro drr drs dsd dse dsk dsm dso dsr dss ed- edd ede edk edm edo edr eds eed eee eek eem eeo eer ees ekd eke eko ekr eks em- emd eme emk emm emo emr ems eo- eod eoe eok eom eoo eor eos erd ere erk erm ero err ers es- esd ese esk esm eso esr ess kde kdk kdm kdo kdr kds ke- ked kee kek kem keo ker kes kke kkk kkm kkr kks kmd kme kmk kmm kmo kms kod koe kok kom koo kor kos krd krk kro krr krs ksd kse ksk ksm kso ksr kss m-o m-r mdd mde mdk mdm mdo mdr mds med mee mek mem meo mer mes mkd mke mkk mkm mko mkr mks mmd mme mmk mmm mmo mmr mms mod moe mok mom moo mor mos mrd mre mrk mrm mro mrr mrs msd mse msk msm mso msr mss odd ode odm odo odr ods oed oee oem oeo oer oes okd oke okk oko okr oks om- omd ome omm omo omr oms oo- ood ook oom ooo oor oos or- ord ore ork orm oro orr ors os- osd ose osk osm oso osr oss rdd rde rdm rdo rdr rds re- red ree rek rem reo rer res rke rkk rkm rko rks rmd rme rmm rmo rmr rms rod roe rok rom roo ror ros rrd rrk rrm rrr rrs rsd rse rsk rsm rso rsr rss sdd sde sdk sdm sdo sdr sds se- sed see sek sem seo ser ses sk- skd ske skk skm sko skr sks smd sme smk smm smo smr sms sod soe sok som soo sor sos sr- srd sre srk srm sro srr srs ss- ssd sse ssk ssm sso ssr sss