-er eee eel eem eep eer ees eie eii eil eim eip eir eis ele eli ell elm elp elr els em- eme emi eml emm emp emr ems ep- epe epi epl epm epp epr eps ere eri erl erm erp err ers es- ese esi esl esm esp esr ess ie- iee iei iel iem iep ier ies iie iii iil iim iip iir iis il- ile ili ill ilm ilp ilr ils im- ime imi iml imm imp ims ipe ipi ipl ipm ipp ipr ips ir- ire iri irl irm irp irr irs is- ise isi isl ism isp isr iss l-p lee lei lel lem lep ler les lie lii lil lim lip lir lis lle lli lll llm llp llr lls lme lmi lml lmm lmp lmr lms lpe lpi lpl lpm lpp lpr lps lri lrm lrp lrr lrs lse lsi lsl lsm lsp lsr lss m-r mee mei mel mem mep mer mes mi- mie mii mil mim mip mir mis mle mli mll mlm mlp mlr mls mme mmi mml mmm mmp mmr mms mpe mpi mpl mpm mpp mpr mps mre mri mrl mrm mrp mrr mrs mse msi msl msm msp msr mss p-p pee pei pel pem pep per pes pie pii pil pim pip pir pis ple pli pll plm plp plr pls pme pmi pml pmm pmp pmr pms ppe ppi ppl ppm ppp ppr pps pre pri prl prm prp prr prs ps- pse psi psl psm psp psr pss re- ree rei rel rem rep rer res rie rii ril rim rip rir ris rle rli rll rlm rlp rlr rls rme rmi rml rmm rmp rmr rms rpe rpi rpl rpm rpp rpr rps rri rrl rrm rrp rrr rrs rse rsi rsl rsm rsp rsr rss se- see sei sel sem sep ser ses sie sii sil sim sip sir sis sle sli sll slm slp slr sls sme smi sml smm smp smr sms spe spi spl spm spp spr sps sr- sre sri srl srm srp srr srs ss- sse ssi ssl ssm ssp ssr sss