-er eee eef eem een eer eet ef- efe eff efm efr eft em- eme emf emm emn emr emt en- ene enf enm enn enr ent ere erf erm ern err ert ete etf etm etn etr ett fee fef fem fen fer fet ffe fff ffm ffn ffr fft fme fmf fmm fmn fmr fmt fne fnf fnm fnn fnr fnt fre frf frm frn frr frt fte ftf ftm ftn ftr ftt m-f m-r mee mef mem men mer met mfe mff mfm mfn mfr mft mme mmf mmm mmn mmr mmt mne mnf mnm mnn mnr mnt mre mrf mrm mrn mrr mrt mte mtf mtm mtn mtr mtt ne- nee nef nem nen ner net nfe nff nfn nfr nft nme nmm nmn nmr nmt nne nnf nnm nnn nnt nre nrf nrm nrn nrr nrt nte ntf ntm ntn ntr ntt re- ree ref rem ren rer ret rfe rff rfm rfn rfr rft rme rmf rmm rmn rmr rmt rnm rnn rnr rnt rrf rrm rrn rrr rrt rte rtf rtm rtn rtr rtt te- tee tef tem ten ter tet tfe tff tfm tfn tfr tft tme tmf tmm tmn tmr tmt tne tnf tnm tnn tnr tnt tre trf trm trn trr trt tte ttf ttm ttn ttr ttt