-er -up eee eem eep eer ees eie eii eim eip eir eis eiu em- eme emi emm emp emr ems emu ep- epe epi epm epp epr eps epu ere eri erm erp err ers eru es- ese esi esm esp esr ess esu eu- eue eui eup eur eus ie- iee iei iem iep ier ies iie iii iim iip iir iis iiu im- ime imi imm imp ims imu ipe ipi ipm ipp ipr ips ipu ir- ire iri irm irp irr irs iru is- ise isi ism isp isr iss isu iu- iue iui ium iup iur ius m-r mee mei mem mep mer mes meu mi- mie mii mim mip mir mis miu mme mmi mmm mmp mmr mms mmu mpe mpi mpm mpp mpr mps mpu mre mri mrm mrp mrr mrs mru mse msi msm msp msr mss msu mue mui mum mup mur mus muu p-p pee pei pem pep per pes peu pie pii pim pip pir pis piu pme pmi pmm pmp pmr pms pmu ppe ppi ppm ppp ppr pps ppu pre pri prm prp prr prs pru ps- pse psi psm psp psr pss psu pue pui pum pup pur pus puu re- ree rei rem rep rer res reu rie rii rim rip rir ris rme rmi rmm rmp rmr rms rpe rpi rpm rpp rpr rps rpu rri rrm rrp rrr rrs rru rse rsi rsm rsp rsr rss rsu rue rui rum rup rur rus ruu se- see sei sem sep ser ses seu sie sii sim sip sir sis siu sme smi smm smp smr sms smu spe spi spm spp spr sps spu sr- sre sri srm srp srr srs ss- sse ssi ssm ssp ssr sss ssu sue sui sum sup sur sus suu uee uei uem uep uer ues uie uii uim uip uir uis uiu um- ume umi umm ump umr ums umu up- upe upi upm upp upr ups upu ur- ure uri urm urp urr urs uru use usi usm usp usr uss usu uue uum uur uus uuu