a-a a-c aaa aac aae aah aam aax ac- aca acc ace ach acm acx aea aec aee aeh aem aex aha ahc ahe ahh ahm ahx ama amc ame amh amm amx ax- axa axe axh axm axx c-- caa cac cae cah cam cax cca ccc cce cch ccm ccx ce- cea cec cee ceh cem cex ch- cha chc che chh chm chx cma cmc cme cmh cmm cmx cxc cxh cxx eaa eac eae eah eam eax ec- eca ecc ece ech ecm ecx eea eec eee eem eex eha ehc ehe ehh ehm em- ema emc eme emh emm emx ex- exa exc exe exh exx haa hac hae hah ham hax hca hcc hce hch hcm he- hea hec hee heh hem hex hha hhc hhe hhh hhm hma hmc hme hmh hmm hmx hxc hxm maa mac mae mah mam max mc- mca mcc mce mch mcm mcx mea mec mee meh mem mex mha mhc mhh mhm mhx mma mmc mme mmh mmm mmx mxa mxc xaa xac xam xch xcx xee xem xex xma xmc xmh xmm xmx xxx