Task: Program Execution
Input (English): tQVIDVxYvpUWTvjxMXLvkiDerIrZri, mfsdnHHKWVxYvpUWTvjxMXRpvAJezrHjDXV
Output (English): a, d, e, f, h, j, k, m, n, p, r, s, t, u, v, w, x, y, z