-ey a-a a-c aaa aac aae aam aao aax aay ac- aca acc ace acm aco acx acy aea aec aee aem aeo aex aey ama amc ame amm amo amx amy aoa aoc aoe aom aoo aox ax- axa axe axm axo axx ay- aya ayc aye ayo ayx c-- caa cac cae cam cao cax cay cca ccc cce ccm cco ccx ce- cea cec cee cem ceo cex cey cma cmc cme cmm cmo cmx cmy co- coa coc coe com coo cox coy cxc cxo cxx cya cyc cye cym cyo eaa eac eae eam eao eax ec- eca ecc ece ecm eco ecx eea eec eee eem eeo eex eey em- ema emc eme emm emo emx eo- eoa eoc eoe eom eoo ex- exa exc exe exo exx exy eya eyc eye eym eyo m-o maa mac mae mam mao max may mc- mca mcc mce mcm mco mcx mea mec mee mem meo mex mey mma mmc mme mmm mmo mmx moa moc moe mom moo mox moy mxa mxc my- mya myc mye mym myo myx oaa oac oae oam oao oax oc- oca occ ocm oco ocx oea oec oee oem oeo oex oey om- oma omc ome omm omo omx omy oo- ooa ooc oom ooo oox ox- oxa oxc oxo oxx oxy oya oye oyo xaa xac xam xcx xee xem xex xma xmc xmm xmo xmx xoa xoc xom xoo xox xxo xxx xxy xyy yaa yac yae yam yao yax yay yca ycc yce yco ycy yea yec yee yem yeo yex yey yma ymc yme ymm ymo yoc yoe yom yoo yox yoy yxa yxe yxy yyc yye yyy