-er eee eef eel eer ees ef- efe eff efi efl efr efs eie eif eii eil eir eis ele elf eli ell elr els ere erf eri erl err ers es- ese esf esi esl esr ess fee fef fei fel fer fes ffe fff ffi ffl ffr ffs fie fif fii fil fir fis fle flf fli fll flr fls fre frf fri frl frr frs fse fsf fsi fsl fsr fss i-f ie- iee ief iei iel ier ies ife iff ifi ifl ifr ifs iie iif iii iil iir iis il- ile ilf ili ill ilr ils ir- ire irf iri irl irr irs is- ise isf isi isl isr iss lee lef lei lel ler les lfe lff lfi lfl lfr lfs lie lif lii lil lir lis lle llf lli lll llr lls lrf lri lrr lrs lse lsf lsi lsl lsr lss re- ree ref rei rel rer res rfe rff rfi rfl rfr rfs rie rif rii ril rir ris rle rlf rli rll rlr rls rrf rri rrl rrr rrs rse rsf rsi rsl rsr rss se- see sef sei sel ser ses sfe sff sfi sfl sfr sfs sie sif sii sil sir sis sle slf sli sll slr sls sr- sre srf sri srl srr srs ss- sse ssf ssi ssl ssr sss