-er eee eek eem eer ees eke ekr eks eku em- eme emk emm emr ems emu ere erk erm err ers eru es- ese esk esm esr ess esu eu- eue eur eus ke- kee kek kem ker kes kke kkk kkm kkr kks kku kme kmk kmm kms kmu krk krr krs kru kse ksk ksm ksr kss ksu kue kuk kum kur kus kuu m-r mee mek mem mer mes meu mke mkk mkm mkr mks mku mme mmk mmm mmr mms mmu mre mrk mrm mrr mrs mru mse msk msm msr mss msu mue muk mum mur mus muu re- ree rek rem rer res reu rke rkk rkm rks rku rme rmm rmr rms rrk rrm rrr rrs rru rse rsk rsm rsr rss rsu rue ruk rum rur rus ruu se- see sek sem ser ses seu sk- ske skk skm skr sks sku sme smk smm smr sms smu sr- sre srk srm srr srs ss- sse ssk ssm ssr sss ssu sue suk sum sur sus suu uee uem uer ues uke ukk ukr uku um- ume umm umr ums umu ur- ure urk urm urr urs uru use usk usm usr uss usu uue uum uur uus uuu