Task: Program Execution
Input (English): PRCPmRMLJCzkoqIqALXldqqsHcJNjjzsU, cAKVvraRfJIqALXldqqsHcJNoYZoqyDG
Output (English): a, c, d, h, i, j, k, l, m, n, o, p, q, r, s, u, x, z