-er -up eee eek eem eep eer eke ekp ekr eku em- eme emk emm emp emr emu ep- epe epm epp epr epu ere erk erm erp err eru eu- eue eup eur ke- kee kek kem kep ker kke kkk kkm kkp kkr kku kme kmk kmm kmp kmu kpe kpk kpm kpp kpr kpu krk krp krr kru kue kuk kum kup kur kuu m-r mee mek mem mep mer meu mke mkk mkm mkp mkr mku mme mmk mmm mmp mmr mmu mpe mpk mpm mpp mpr mpu mre mrk mrm mrp mrr mru mue muk mum mup mur muu p-p pee pek pem pep per peu pke pkm pkp pkr pku pme pmk pmm pmp pmr pmu ppe ppk ppm ppp ppr ppu pre prk prm prp prr pru pue puk pum pup pur puu re- ree rek rem rep rer reu rke rkk rkm rkp rku rme rmm rmp rmr rpe rpk rpm rpp rpr rpu rrk rrm rrp rrr rru rue ruk rum rup rur ruu uee uem uep uer uke ukk ukp ukr uku um- ume umm ump umr umu up- upe upk upm upp upr upu ur- ure urk urm urp urr uru uue uum uur uuu