-er eee eef eem een eep eer eet ef- efe eff efm efp efr eft em- eme emf emm emn emp emr emt en- ene enf enm enn enp enr ent ep- epe epf epm epn epp epr ept ere erf erm ern erp err ert ete etf etm etn etp etr ett fee fef fem fen fep fer fet ffe fff ffm ffn ffp ffr fft fme fmf fmm fmn fmp fmr fmt fne fnf fnm fnn fnp fnr fnt fpe fpm fpn fpp fpr fpt fre frf frm frn frp frr frt fte ftf ftm ftn ftp ftr ftt m-f m-r mee mef mem men mep mer met mfe mff mfm mfn mfp mfr mft mme mmf mmm mmn mmp mmr mmt mne mnf mnm mnn mnp mnr mnt mpe mpf mpm mpn mpp mpr mpt mre mrf mrm mrn mrp mrr mrt mte mtf mtm mtn mtp mtr mtt ne- nee nef nem nen nep ner net nfe nff nfn nfp nfr nft nme nmm nmn nmp nmr nmt nne nnf nnm nnn nnp nnt npe npf npm npn npp npr npt nre nrf nrm nrn nrp nrr nrt nte ntf ntm ntn ntp ntr ntt p-p pee pef pem pen pep per pet pfe pff pfm pfn pfp pfr pft pme pmf pmm pmn pmp pmr pmt pn- pne pnf pnm pnn pnp pnr pnt ppe ppf ppm ppn ppp ppr ppt pre prf prm prn prp prr prt pt- pte ptf ptm ptn ptp ptr ptt re- ree ref rem ren rep rer ret rfe rff rfm rfn rfp rfr rft rme rmf rmm rmn rmp rmr rmt rnm rnn rnp rnr rnt rpe rpf rpm rpn rpp rpr rpt rrf rrm rrn rrp rrr rrt rte rtf rtm rtn rtp rtr rtt te- tee tef tem ten tep ter tet tfe tff tfm tfn tfp tfr tft tme tmf tmm tmn tmp tmr tmt tne tnf tnm tnn tnp tnr tnt tpe tpf tpm tpn tpp tpr tpt tre trf trm trn trp trr trt tte ttf ttm ttn ttp ttr ttt