-er eee eef eel eem eer ef- efe eff efi efl efm efr eie eif eii eil eim eir ele elf eli ell elm elr em- eme emf emi eml emm emr ere erf eri erl erm err fee fef fei fel fem fer ffe fff ffi ffl ffm ffr fie fif fii fil fim fir fle flf fli fll flm flr fme fmf fmi fml fmm fmr fre frf fri frl frm frr i-f ie- iee ief iei iel iem ier ife iff ifi ifl ifm ifr iie iif iii iil iim iir il- ile ilf ili ill ilm ilr im- ime imf imi iml imm ir- ire irf iri irl irm irr lee lef lei lel lem ler lfe lff lfi lfl lfm lfr lie lif lii lil lim lir lle llf lli lll llm llr lme lmf lmi lml lmm lmr lrf lri lrm lrr m-f m-r mee mef mei mel mem mer mfe mff mfi mfl mfm mfr mi- mie mif mii mil mim mir mle mlf mli mll mlm mlr mme mmf mmi mml mmm mmr mre mrf mri mrl mrm mrr re- ree ref rei rel rem rer rfe rff rfi rfl rfm rfr rie rif rii ril rim rir rle rlf rli rll rlm rlr rme rmf rmi rml rmm rmr rrf rri rrl rrm rrr