Task: Program Execution
Input (English): qlNnIWPuJTQAKjDlYKddTPbhzlrSMeZD, WcnGxwnWPuJTQAKjDlYKdfPIwuPUZRiVSC
Output (English): a, c, d, f, g, i, j, k, l, n, p, q, r, s, t, u, v, w, x, y, z