Task: Program Execution
Input (English): mlZiPmubWwFUkwvdlcTZXkalQpVfG, DCUQEuzQyeVHBiPmubWwFUkwvdlvghodgtCyIylr
Output (English): b, c, d, e, f, g, h, i, k, l, m, o, p, q, r, t, u, v, w, y, z