a-a a-c aaa aac aae aam aap ac- aca acc ace acm acp aea aec aee aem aep ama amc ame amm amp ap- apa apc ape apm app c-- caa cac cae cam cap cca ccc cce ccm ccp ce- cea cec cee cem cep cma cmc cme cmm cmp cpa cpc cpe cpm cpp eaa eac eae eam eap ec- eca ecc ece ecm eea eec eee eem eep em- ema emc eme emm emp ep- epa epc epe epm epp maa mac mae mam map mc- mca mcc mce mcm mcp mea mec mee mem mep mma mmc mme mmm mmp mpa mpc mpe mpm mpp p-p paa pac pae pam pap pca pcc pce pcm pcp pea pec pee pem pep pma pmc pme pmm pmp ppa ppc ppe ppm ppp