-er eee eek eem eep eer ees eie eii eik eim eip eir eis eke eki ekp ekr eks em- eme emi emk emm emp emr ems ep- epe epi epm epp epr eps ere eri erk erm erp err ers es- ese esi esk esm esp esr ess ie- iee iei iek iem iep ier ies iie iii iim iip iir iis ike iki ikk ikr iks im- ime imi imm imp ims ipe ipi ipm ipp ipr ips ir- ire iri irk irm irp irr irs is- ise isi isk ism isp isr iss ke- kee kei kek kem kep ker kes kie kii kik kim kip kir kis kke kki kkk kkm kkp kkr kks kme kmi kmk kmm kmp kms kpe kpi kpk kpm kpp kpr kps kri krk krp krr krs kse ksi ksk ksm ksp ksr kss m-r mee mei mek mem mep mer mes mi- mie mii mik mim mip mir mis mke mkk mkm mkp mkr mks mme mmi mmk mmm mmp mmr mms mpe mpi mpk mpm mpp mpr mps mre mri mrk mrm mrp mrr mrs mse msi msk msm msp msr mss p-p pee pei pek pem pep per pes pie pii pik pim pip pir pis pke pki pkm pkp pkr pks pme pmi pmk pmm pmp pmr pms ppe ppi ppk ppm ppp ppr pps pre pri prk prm prp prr prs ps- pse psi psk psm psp psr pss re- ree rei rek rem rep rer res rie rii rik rim rip rir ris rke rkk rkm rkp rks rme rmi rmm rmp rmr rms rpe rpi rpk rpm rpp rpr rps rri rrk rrm rrp rrr rrs rse rsi rsk rsm rsp rsr rss se- see sei sek sem sep ser ses sie sii sik sim sip sir sis sk- ske ski skk skm skp skr sks sme smi smk smm smp smr sms spe spi spk spm spp spr sps sr- sre sri srk srm srp srr srs ss- sse ssi ssk ssm ssp ssr sss