a-a aaa aae aam aan aap aea aee aem aen aep ama ame amm amn amp an- ana ane anm ann anp ap- apa ape apm apn app eaa eae eam ean eap eea eee eem een eep em- ema eme emm emn emp en- ena ene enm enn enp ep- epa epe epm epn epp maa mae mam man map mea mee mem men mep mma mme mmm mmn mmp mna mne mnm mnn mnp mpa mpe mpm mpn mpp naa nae nam nan nap ne- nea nee nem nen nep nma nme nmm nmn nmp nna nne nnm nnn nnp npa npe npm npn npp p-p paa pae pam pan pap pea pee pem pen pep pma pme pmm pmn pmp pn- pna pne pnm pnn pnp ppa ppe ppm ppn ppp