Task: Program Execution
Input (English): PhXlkPDbogYvrGxnnZOeAUTFjrZicE, vMMcrGxnnZOeAUTFjXEUU
Output (English): a, b, c, d, e, f, g, h, i, j, k, l, n, o, p, r, t, u, v, x, y, z