-er -up eee eek eem eep eer ees eke ekp ekr eks eku em- eme emk emm emp emr ems emu ep- epe epm epp epr eps epu ere erk erm erp err ers eru es- ese esk esm esp esr ess esu eu- eue eup eur eus ke- kee kek kem kep ker kes kke kkk kkm kkp kkr kks kku kme kmk kmm kmp kms kmu kpe kpk kpm kpp kpr kps kpu krk krp krr krs kru kse ksk ksm ksp ksr kss ksu kue kuk kum kup kur kus kuu m-r mee mek mem mep mer mes meu mke mkk mkm mkp mkr mks mku mme mmk mmm mmp mmr mms mmu mpe mpk mpm mpp mpr mps mpu mre mrk mrm mrp mrr mrs mru mse msk msm msp msr mss msu mue muk mum mup mur mus muu p-p pee pek pem pep per pes peu pke pkm pkp pkr pks pku pme pmk pmm pmp pmr pms pmu ppe ppk ppm ppp ppr pps ppu pre prk prm prp prr prs pru ps- pse psk psm psp psr pss psu pue puk pum pup pur pus puu re- ree rek rem rep rer res reu rke rkk rkm rkp rks rku rme rmm rmp rmr rms rpe rpk rpm rpp rpr rps rpu rrk rrm rrp rrr rrs rru rse rsk rsm rsp rsr rss rsu rue ruk rum rup rur rus ruu se- see sek sem sep ser ses seu sk- ske skk skm skp skr sks sku sme smk smm smp smr sms smu spe spk spm spp spr sps spu sr- sre srk srm srp srr srs ss- sse ssk ssm ssp ssr sss ssu sue suk sum sup sur sus suu uee uem uep uer ues uke ukk ukp ukr uku um- ume umm ump umr ums umu up- upe upk upm upp upr ups upu ur- ure urk urm urp urr urs uru use usk usm usp usr uss usu uue uum uur uus uuu