-er eee eek eem eeo eer ees eie eii eik eim eio eir eis eke eki eko ekr eks em- eme emi emk emm emo emr ems eo- eoe eoi eok eom eoo eor eos ere eri erk erm ero err ers es- ese esi esk esm eso esr ess ie- iee iei iek iem ier ies iie iii iim iio iir iis ike iki ikk iko ikr iks im- ime imi imm imo ims io- ioe ioi iom ioo ior ios ir- ire iri irk irm iro irr irs is- ise isi isk ism iso isr iss ke- kee kei kek kem keo ker kes kie kii kik kim kio kir kis kke kki kkk kkm kkr kks kme kmi kmk kmm kmo kms koe koi kok kom koo kor kos kri krk kro krr krs kse ksi ksk ksm kso ksr kss m-o m-r mee mei mek mem meo mer mes mi- mie mii mik mim mio mir mis mke mkk mkm mko mkr mks mme mmi mmk mmm mmo mmr mms moe moi mok mom moo mor mos mre mri mrk mrm mro mrr mrs mse msi msk msm mso msr mss o-i oee oei oem oeo oer oes oie oii oik oim oio oir ois oke oki okk oko okr oks om- ome omi omm omo omr oms oo- ooi ook oom ooo oor oos or- ore ori ork orm oro orr ors os- ose osi osk osm oso osr oss re- ree rei rek rem reo rer res rie rii rik rim rio rir ris rke rkk rkm rko rks rme rmi rmm rmo rmr rms roe roi rok rom roo ror ros rri rrk rrm rrr rrs rse rsi rsk rsm rso rsr rss se- see sei sek sem seo ser ses sie sii sik sim sio sir sis sk- ske ski skk skm sko skr sks sme smi smk smm smo smr sms soe soi sok som soo sor sos sr- sre sri srk srm sro srr srs ss- sse ssi ssk ssm sso ssr sss