a-a a-c aaa aac aae aam aan aap ac- aca acc ace acm acn acp aea aec aee aem aen aep ama amc ame amm amn amp an- ana anc ane anm ann anp ap- apa apc ape apm apn app c-- caa cac cae cam can cap cca ccc cce ccm ccn ccp ce- cea cec cee cem cen cep cma cmc cme cmm cmn cmp cn- cna cnc cne cnm cnn cnp cpa cpc cpe cpm cpn cpp eaa eac eae eam ean eap ec- eca ecc ece ecm ecn eea eec eee eem een eep em- ema emc eme emm emn emp en- ena enc ene enm enn enp ep- epa epc epe epm epn epp maa mac mae mam man map mc- mca mcc mce mcm mcn mcp mea mec mee mem men mep mma mmc mme mmm mmn mmp mna mnc mne mnm mnn mnp mpa mpc mpe mpm mpn mpp naa nac nae nam nan nap nca ncc nce ncm ncn ncp ne- nea nec nee nem nen nep nma nmc nme nmm nmn nmp nna nnc nne nnm nnn nnp npa npc npe npm npn npp p-p paa pac pae pam pan pap pca pcc pce pcm pcn pcp pea pec pee pem pen pep pma pmc pme pmm pmn pmp pn- pna pnc pne pnm pnn pnp ppa ppc ppe ppm ppn ppp