a-a a-c aaa aac aae aaf aam aap ac- aca acc ace acf acm acp aea aec aee aef aem aep af- afa afc afe aff afm afp ama amc ame amf amm amp ap- apa apc ape apf apm app c-- caa cac cae caf cam cap cca ccc cce ccf ccm ccp ce- cea cec cee cef cem cep cfa cfc cfe cff cfm cfp cma cmc cme cmf cmm cmp cpa cpc cpe cpf cpm cpp eaa eac eae eaf eam eap ec- eca ecc ece ecf ecm eea eec eee eef eem eep ef- efa efc efe eff efm efp em- ema emc eme emf emm emp ep- epa epc epe epf epm epp faa fac fae faf fam fap fca fcc fce fcf fcm fcp fea fec fee fef fem fep ffa ffc ffe fff ffm ffp fma fmc fme fmf fmm fmp fpa fpc fpe fpm fpp m-f maa mac mae maf mam map mc- mca mcc mce mcf mcm mcp mea mec mee mef mem mep mfa mfc mfe mff mfm mfp mma mmc mme mmf mmm mmp mpa mpc mpe mpf mpm mpp p-p paa pac pae paf pam pap pca pcc pce pcf pcm pcp pea pec pee pef pem pep pfa pfc pfe pff pfm pfp pma pmc pme pmf pmm pmp ppa ppc ppe ppf ppm ppp