Task: Program Execution
Input (English): keNbnRYRwLpZTvxsOeQKSMZUUBDfOwrRAPUwEp, MCSGZTvxsOeQKSMZUUBxLpfoSBZVJ
Output (English): a, b, d, e, f, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z