-er eee eef eel eem eer ees ef- efe eff efi efl efm efr efs eie eif eii eil eim eir eis ele elf eli ell elm elr els em- eme emf emi eml emm emr ems ere erf eri erl erm err ers es- ese esf esi esl esm esr ess fee fef fei fel fem fer fes ffe fff ffi ffl ffm ffr ffs fie fif fii fil fim fir fis fle flf fli fll flm flr fls fme fmf fmi fml fmm fmr fms fre frf fri frl frm frr frs fse fsf fsi fsl fsm fsr fss i-f ie- iee ief iei iel iem ier ies ife iff ifi ifl ifm ifr ifs iie iif iii iil iim iir iis il- ile ilf ili ill ilm ilr ils im- ime imf imi iml imm ims ir- ire irf iri irl irm irr irs is- ise isf isi isl ism isr iss lee lef lei lel lem ler les lfe lff lfi lfl lfm lfr lfs lie lif lii lil lim lir lis lle llf lli lll llm llr lls lme lmf lmi lml lmm lmr lms lrf lri lrm lrr lrs lse lsf lsi lsl lsm lsr lss m-f m-r mee mef mei mel mem mer mes mfe mff mfi mfl mfm mfr mfs mi- mie mif mii mil mim mir mis mle mlf mli mll mlm mlr mls mme mmf mmi mml mmm mmr mms mre mrf mri mrl mrm mrr mrs mse msf msi msl msm msr mss re- ree ref rei rel rem rer res rfe rff rfi rfl rfm rfr rfs rie rif rii ril rim rir ris rle rlf rli rll rlm rlr rls rme rmf rmi rml rmm rmr rms rrf rri rrl rrm rrr rrs rse rsf rsi rsl rsm rsr rss se- see sef sei sel sem ser ses sfe sff sfi sfl sfm sfr sfs sie sif sii sil sim sir sis sle slf sli sll slm slr sls sme smf smi sml smm smr sms sr- sre srf sri srl srm srr srs ss- sse ssf ssi ssl ssm ssr sss