Task: Program Execution
Input (English): 4175 a 9267 T 1417 Z 7841 3747 5601 4051 U 6035 5987 4173 D F Z 5021 z x 7817 7449 1429 7801 2639 U
Output (English): a, T, Z, U, D, F, Z, z, x, U