Task: Program Execution
Input (English): BHgPkObYqcAxAlOpdaYwVLZucTQkHVxZldVkpIKI, cKlOpdaYwVLZucTQkSugJY
Output (English): a, b, c, d, g, h, i, k, l, o, p, q, t, u, v, w, x, y, z