-er eee eem eeo eer ees eie eii eim eio eir eis em- eme emi emm emo emr ems eo- eoe eoi eom eoo eor eos ere eri erm ero err ers es- ese esi esm eso esr ess ie- iee iei iem ier ies iie iii iim iio iir iis im- ime imi imm imo ims io- ioe ioi iom ioo ior ios ir- ire iri irm iro irr irs is- ise isi ism iso isr iss m-o m-r mee mei mem meo mer mes mi- mie mii mim mio mir mis mme mmi mmm mmo mmr mms moe moi mom moo mor mos mre mri mrm mro mrr mrs mse msi msm mso msr mss o-i oee oei oem oeo oer oes oie oii oim oio oir ois om- ome omi omm omo omr oms oo- ooi oom ooo oor oos or- ore ori orm oro orr ors os- ose osi osm oso osr oss re- ree rei rem reo rer res rie rii rim rio rir ris rme rmi rmm rmo rmr rms roe roi rom roo ror ros rri rrm rrr rrs rse rsi rsm rso rsr rss se- see sei sem seo ser ses sie sii sim sio sir sis sme smi smm smo smr sms soe soi som soo sor sos sr- sre sri srm sro srr srs ss- sse ssi ssm sso ssr sss