-er eee eef eel eem eep eer ees ef- efe eff efi efl efm efp efr efs eie eif eii eil eim eip eir eis ele elf eli ell elm elp elr els em- eme emf emi eml emm emp emr ems ep- epe epf epi epl epm epp epr eps ere erf eri erl erm erp err ers es- ese esf esi esl esm esp esr ess fee fef fei fel fem fep fer fes ffe fff ffi ffl ffm ffp ffr ffs fie fif fii fil fim fip fir fis fle flf fli fll flm flp flr fls fme fmf fmi fml fmm fmp fmr fms fpe fpi fpl fpm fpp fpr fps fre frf fri frl frm frp frr frs fse fsf fsi fsl fsm fsp fsr fss i-f ie- iee ief iei iel iem iep ier ies ife iff ifi ifl ifm ifp ifr ifs iie iif iii iil iim iip iir iis il- ile ilf ili ill ilm ilp ilr ils im- ime imf imi iml imm imp ims ipe ipf ipi ipl ipm ipp ipr ips ir- ire irf iri irl irm irp irr irs is- ise isf isi isl ism isp isr iss l-p lee lef lei lel lem lep ler les lfe lff lfi lfl lfm lfp lfr lfs lie lif lii lil lim lip lir lis lle llf lli lll llm llp llr lls lme lmf lmi lml lmm lmp lmr lms lpe lpf lpi lpl lpm lpp lpr lps lrf lri lrm lrp lrr lrs lse lsf lsi lsl lsm lsp lsr lss m-f m-r mee mef mei mel mem mep mer mes mfe mff mfi mfl mfm mfp mfr mfs mi- mie mif mii mil mim mip mir mis mle mlf mli mll mlm mlp mlr mls mme mmf mmi mml mmm mmp mmr mms mpe mpf mpi mpl mpm mpp mpr mps mre mrf mri mrl mrm mrp mrr mrs mse msf msi msl msm msp msr mss p-p pee pef pei pel pem pep per pes pfe pff pfi pfl pfm pfp pfr pfs pie pif pii pil pim pip pir pis ple plf pli pll plm plp plr pls pme pmf pmi pml pmm pmp pmr pms ppe ppf ppi ppl ppm ppp ppr pps pre prf pri prl prm prp prr prs ps- pse psf psi psl psm psp psr pss re- ree ref rei rel rem rep rer res rfe rff rfi rfl rfm rfp rfr rfs rie rif rii ril rim rip rir ris rle rlf rli rll rlm rlp rlr rls rme rmf rmi rml rmm rmp rmr rms rpe rpf rpi rpl rpm rpp rpr rps rrf rri rrl rrm rrp rrr rrs rse rsf rsi rsl rsm rsp rsr rss se- see sef sei sel sem sep ser ses sfe sff sfi sfl sfm sfp sfr sfs sie sif sii sil sim sip sir sis sle slf sli sll slm slp slr sls sme smf smi sml smm smp smr sms spe spf spi spl spm spp spr sps sr- sre srf sri srl srm srp srr srs ss- sse ssf ssi ssl ssm ssp ssr sss