a-a a-c aaa aac aae aam aap aax ac- aca acc ace acm acp acx aea aec aee aem aep aex ama amc ame amm amp amx ap- apa apc ape apm app apx ax- axa axe axm axp axx c-- caa cac cae cam cap cax cca ccc cce ccm ccp ccx ce- cea cec cee cem cep cex cma cmc cme cmm cmp cmx cpa cpc cpe cpm cpp cpx cxc cxp cxx eaa eac eae eam eap eax ec- eca ecc ece ecm ecx eea eec eee eem eep eex em- ema emc eme emm emp emx ep- epa epc epe epm epp epx ex- exa exc exe exp exx maa mac mae mam map max mc- mca mcc mce mcm mcp mcx mea mec mee mem mep mex mma mmc mme mmm mmp mmx mpa mpc mpe mpm mpp mpx mxa mxc mxp p-p paa pac pae pam pap pax pca pcc pce pcm pcp pcx pea pec pee pem pep pex pma pmc pme pmm pmp pmx ppa ppc ppe ppm ppp ppx pxc pxe pxm xaa xac xam xap xcp xcx xee xem xep xex xma xmc xmm xmp xmx xpa xpc xpe xpm xpp xxp xxx