-er eee eem een eeo eep eer em- eme emm emn emo emp emr en- ene enm enn eno enp enr eo- eoe eom eon eoo eop eor ep- epe epm epn epo epp epr ere erm ern ero erp err m-o m-r mee mem men meo mep mer mme mmm mmn mmo mmp mmr mne mnm mnn mno mnp mnr moe mom mon moo mop mor mpe mpm mpn mpo mpp mpr mre mrm mrn mro mrp mrr ne- nee nem nen neo nep ner nme nmm nmn nmo nmp nmr nne nnm nnn nno nnp no- noe nom non noo nop nor npe npm npn npo npp npr nre nrm nrn nro nrp nrr oee oem oen oeo oep oer om- ome omm omn omo omp omr on- one onn ono onp onr oo- oom oon ooo oop oor op- ope opm opn opo opp opr or- ore orm orn oro orp orr p-p pee pem pen peo pep per pme pmm pmn pmo pmp pmr pn- pne pnm pnn pno pnp pnr poe pom pon poo pop por ppe ppm ppn ppo ppp ppr pre prm prn pro prp prr re- ree rem ren reo rep rer rme rmm rmn rmo rmp rmr rnm rnn rno rnp rnr roe rom ron roo rop ror rpe rpm rpn rpo rpp rpr rrm rrn rrp rrr