Task: Program Execution
Input (English): McwyiVnPzMQTrRVtLsmuXVrFAtcIfEEmqebU, oYcHTrRVtLsmuXVrFAnxL
Output (English): a, b, c, e, f, i, l, m, n, p, q, r, s, t, u, v, w, x, y, z