-er eee eek eem een eep eer eke ekp ekr em- eme emk emm emn emp emr en- ene enk enm enn enp enr ep- epe epm epn epp epr ere erk erm ern erp err ke- kee kek kem ken kep ker kke kkk kkm kkn kkp kkr kme kmk kmm kmp kn- kne knk knm knn knp knr kpe kpk kpm kpn kpp kpr krk krn krp krr m-r mee mek mem men mep mer mke mkk mkm mkn mkp mkr mme mmk mmm mmn mmp mmr mne mnk mnm mnn mnp mnr mpe mpk mpm mpn mpp mpr mre mrk mrm mrn mrp mrr ne- nee nek nem nen nep ner nke nkk nkm nkn nkp nkr nme nmk nmm nmn nmp nmr nne nnk nnm nnn nnp npe npm npn npp npr nre nrk nrm nrn nrp nrr p-p pee pek pem pen pep per pke pkm pkn pkp pkr pme pmk pmm pmn pmp pmr pn- pne pnk pnm pnn pnp pnr ppe ppk ppm ppn ppp ppr pre prk prm prn prp prr re- ree rek rem ren rep rer rke rkk rkm rkp rme rmm rmn rmp rmr rnm rnn rnp rnr rpe rpk rpm rpn rpp rpr rrk rrm rrn rrp rrr