-er eee eem een eep eer ees eet em- eme emm emn emp emr ems emt en- ene enm enn enp enr ens ent ep- epe epm epn epp epr eps ept ere erm ern erp err ers ert es- ese esm esn esp esr ess est ete etm etn etp etr ets ett m-r mee mem men mep mer mes met mme mmm mmn mmp mmr mms mmt mne mnm mnn mnp mnr mns mnt mpe mpm mpn mpp mpr mps mpt mre mrm mrn mrp mrr mrs mrt mse msm msn msp msr mss mst mte mtm mtn mtp mtr mts mtt ne- nee nem nen nep ner nes net nme nmm nmn nmp nmr nms nmt nne nnm nnn nnp nns nnt npe npm npn npp npr nps npt nre nrm nrn nrp nrr nrs nrt nse nsm nsn nsp nsr nss nst nte ntm ntn ntp ntr nts ntt p-p pee pem pen pep per pes pet pme pmm pmn pmp pmr pms pmt pn- pne pnm pnn pnp pnr pns pnt ppe ppm ppn ppp ppr pps ppt pre prm prn prp prr prs prt ps- pse psm psn psp psr pss pst pt- pte ptm ptn ptp ptr pts ptt re- ree rem ren rep rer res ret rme rmm rmn rmp rmr rms rmt rnm rnn rnp rnr rns rnt rpe rpm rpn rpp rpr rps rpt rrm rrn rrp rrr rrs rrt rse rsm rsn rsp rsr rss rst rte rtm rtn rtp rtr rts rtt se- see sem sen sep ser ses set sme smm smn smp smr sms smt sne snm snn snp snr sns snt spe spm spn spp spr sps spt sr- sre srm srn srp srr srs srt ss- sse ssm ssn ssp ssr sss sst ste stm stn stp str sts stt te- tee tem ten tep ter tes tet tme tmm tmn tmp tmr tms tmt tne tnm tnn tnp tnr tns tnt tpe tpm tpn tpp tpr tps tpt tre trm trn trp trr trs trt tse tsm tsn tsp tsr tss tst tte ttm ttn ttp ttr tts ttt