Task: Program Execution
Input (English): OXZmgkfvMMWfRpEEpKbAmWvryfjEbuEQDS, CIWfRpEEpKbAmWhVXIQPGB
Output (English): a, b, d, e, f, g, j, k, m, o, p, q, r, s, u, v, w, x, y, z