a-a a-c a-z aaa aac aae aam aap aaz ac- aca acc ace acm acp acz aea aec aee aem aep aez ama amc ame amm amp amz ap- apa apc ape apm app az- aza aze azm azp azz c-- caa cac cae cam cap caz cca ccc cce ccm ccp ccz ce- cea cec cee cem cep cez cma cmc cme cmm cmp cpa cpc cpe cpm cpp cpz cz- czc cze czm eaa eac eae eam eap eaz ec- eca ecc ece ecm eea eec eee eem eep em- ema emc eme emm emp ep- epa epc epe epm epp epz eze ezz maa mac mae mam map maz mc- mca mcc mce mcm mcp mcz mea mec mee mem mep mez mma mmc mme mmm mmp mmz mpa mpc mpe mpm mpp mza mzm mzp p-p paa pac pae pam pap paz pca pcc pce pcm pcp pea pec pee pem pep pez pma pmc pme pmm pmp pmz ppa ppc ppe ppm ppp ppz pzc pzm pzp zaa zac zam zap zaz zce zea zec zee zem zep zez zma zmc zmm zmp zpc zpe zpm zpp zzz