-er eee eef eem een eeo eep eer ees ef- efe eff efm efo efp efr efs em- eme emf emm emn emo emp emr ems en- ene enf enm enn eno enp enr ens eo- eoe eof eom eon eoo eop eor eos ep- epe epf epm epn epo epp epr eps ere erf erm ern ero erp err ers es- ese esf esm esn eso esp esr ess fee fef fem fen feo fep fer fes ffe fff ffm ffn ffo ffp ffr ffs fme fmf fmm fmn fmo fmp fmr fms fne fnf fnm fnn fnp fnr fns foe fof fom fon foo fop for fos fpe fpm fpn fpo fpp fpr fps fre frf frm frn fro frp frr frs fse fsf fsm fsn fso fsp fsr fss m-f m-o m-r mee mef mem men meo mep mer mes mfe mff mfm mfn mfo mfp mfr mfs mme mmf mmm mmn mmo mmp mmr mms mne mnf mnm mnn mno mnp mnr mns moe mof mom mon moo mop mor mos mpe mpf mpm mpn mpo mpp mpr mps mre mrf mrm mrn mro mrp mrr mrs mse msf msm msn mso msp msr mss ne- nee nef nem nen neo nep ner nes nfe nff nfn nfo nfp nfr nfs nme nmm nmn nmo nmp nmr nms nne nnf nnm nnn nno nnp nns no- noe nof nom non noo nop nor nos npe npf npm npn npo npp npr nps nre nrf nrm nrn nro nrp nrr nrs nse nsf nsm nsn nso nsp nsr nss oee oef oem oen oeo oep oer oes of- ofe off ofm ofn ofo ofp ofr ofs om- ome omf omm omn omo omp omr oms on- one onf onn ono onp onr ons oo- oof oom oon ooo oop oor oos op- ope opf opm opn opo opp opr ops or- ore orf orm orn oro orp orr ors os- ose osf osm osn oso osp osr oss p-p pee pef pem pen peo pep per pes pfe pff pfm pfn pfo pfp pfr pfs pme pmf pmm pmn pmo pmp pmr pms pn- pne pnf pnm pnn pno pnp pnr pns poe pof pom pon poo pop por pos ppe ppf ppm ppn ppo ppp ppr pps pre prf prm prn pro prp prr prs ps- pse psf psm psn pso psp psr pss re- ree ref rem ren reo rep rer res rfe rff rfm rfn rfo rfp rfr rfs rme rmf rmm rmn rmo rmp rmr rms rnm rnn rno rnp rnr rns roe rof rom ron roo rop ror ros rpe rpf rpm rpn rpo rpp rpr rps rrf rrm rrn rrp rrr rrs rse rsf rsm rsn rso rsp rsr rss se- see sef sem sen seo sep ser ses sfe sff sfm sfn sfo sfp sfr sfs sme smf smm smn smo smp smr sms sne snf snm snn sno snp snr sns soe sof som son soo sop sor sos spe spf spm spn spo spp spr sps sr- sre srf srm srn sro srp srr srs ss- sse ssf ssm ssn sso ssp ssr sss