-er eee eef eem een eer ees eet ef- efe eff efm efr efs eft em- eme emf emm emn emr ems emt en- ene enf enm enn enr ens ent ere erf erm ern err ers ert es- ese esf esm esn esr ess est ete etf etm etn etr ets ett fee fef fem fen fer fes fet ffe fff ffm ffn ffr ffs fft fme fmf fmm fmn fmr fms fmt fne fnf fnm fnn fnr fns fnt fre frf frm frn frr frs frt fse fsf fsm fsn fsr fss fst fte ftf ftm ftn ftr fts ftt m-f m-r mee mef mem men mer mes met mfe mff mfm mfn mfr mfs mft mme mmf mmm mmn mmr mms mmt mne mnf mnm mnn mnr mns mnt mre mrf mrm mrn mrr mrs mrt mse msf msm msn msr mss mst mte mtf mtm mtn mtr mts mtt ne- nee nef nem nen ner nes net nfe nff nfn nfr nfs nft nme nmm nmn nmr nms nmt nne nnf nnm nnn nns nnt nre nrf nrm nrn nrr nrs nrt nse nsf nsm nsn nsr nss nst nte ntf ntm ntn ntr nts ntt re- ree ref rem ren rer res ret rfe rff rfm rfn rfr rfs rft rme rmf rmm rmn rmr rms rmt rnm rnn rnr rns rnt rrf rrm rrn rrr rrs rrt rse rsf rsm rsn rsr rss rst rte rtf rtm rtn rtr rts rtt se- see sef sem sen ser ses set sfe sff sfm sfn sfr sfs sft sme smf smm smn smr sms smt sne snf snm snn snr sns snt sr- sre srf srm srn srr srs srt ss- sse ssf ssm ssn ssr sss sst ste stf stm stn str sts stt te- tee tef tem ten ter tes tet tfe tff tfm tfn tfr tfs tft tme tmf tmm tmn tmr tms tmt tne tnf tnm tnn tnr tns tnt tre trf trm trn trr trs trt tse tsf tsm tsn tsr tss tst tte ttf ttm ttn ttr tts ttt