Task: Program Execution
Input (English): xjlfMvJnKPjFeBunTwvSOIjPVBWt, GIpyTNFeBunTwvSOIjPaTuIFBzkWH
Output (English): a, b, e, f, g, h, i, j, k, n, o, p, s, t, u, v, w, y, z