a-a aaa aae aam aau aax aea aee aem aeu aex ama ame amm amu amx au- aua aue aum aux ax- axa axe axm axx eaa eae eam eau eax eea eee eem eex em- ema eme emm emu emx eu- eua eue eux ex- exa exe exu exx maa mae mam mau max mea mee mem meu mex mma mme mmm mmu mmx mua mue mum muu mux mxa mxu ua- uaa uae uam uau uea uee uem um- uma ume umm umu uua uue uum uuu uxu xaa xam xau xee xem xeu xex xma xmm xmu xmx xue xxx