-er ddd dde ddi ddm ddo ddr dds de- ded dee dei dem deo der des di- did die dii dim dio dir dis dmd dme dmi dmm dmo dmr dms dod doe doi dom doo dor dos drd dre dri drm dro drr drs dsd dse dsi dsm dso dsr dss ed- edd ede edi edm edo edr eds eed eee eem eeo eer ees eid eie eii eim eio eir eis em- emd eme emi emm emo emr ems eo- eod eoe eoi eom eoo eor eos erd ere eri erm ero err ers es- esd ese esi esm eso esr ess i-d idd ide idi idm ido idr ids ie- ied iee iei iem ier ies iid iie iii iim iio iir iis im- imd ime imi imm imo ims io- iod ioe ioi iom ioo ior ios ir- ird ire iri irm iro irr irs is- isd ise isi ism iso isr iss m-o m-r mdd mde mdi mdm mdo mdr mds med mee mei mem meo mer mes mi- mid mie mii mim mio mir mis mmd mme mmi mmm mmo mmr mms mod moe moi mom moo mor mos mrd mre mri mrm mro mrr mrs msd mse msi msm mso msr mss o-i odd ode odi odm odo odr ods oed oee oei oem oeo oer oes oid oie oii oim oio oir ois om- omd ome omi omm omo omr oms oo- ood ooi oom ooo oor oos or- ord ore ori orm oro orr ors os- osd ose osi osm oso osr oss rdd rde rdi rdm rdo rdr rds re- red ree rei rem reo rer res rid rie rii rim rio rir ris rmd rme rmi rmm rmo rmr rms rod roe roi rom roo ror ros rrd rri rrm rrr rrs rsd rse rsi rsm rso rsr rss sdd sde sdi sdm sdo sdr sds se- sed see sei sem seo ser ses sid sie sii sim sio sir sis smd sme smi smm smo smr sms sod soe soi som soo sor sos sr- srd sre sri srm sro srr srs ss- ssd sse ssi ssm sso ssr sss