a-a aaa aad aae aam aax ad- ada add ade adm adx aea aed aee aem aex ama amd ame amm amx ax- axa axe axm axx daa dad dae dam dax dda ddd dde ddm ddx de- dea ded dee dem dex dma dmd dme dmm dmx dxd dxx eaa ead eae eam eax ed- eda edd ede edm edx eea eed eee eem eex em- ema emd eme emm emx ex- exa exd exe exx maa mad mae mam max mda mdd mde mdm mdx mea med mee mem mex mma mmd mme mmm mmx mxa mxd xaa xad xam xda xde xdm xed xee xem xex xma xmd xmm xmx xxx