Task: Program Execution
Input (English): 9199 x v n t i u 5669 a 249 r 5191 3743 9711 w n 9629 q b e c u 271 q 8653 b 6941 r 3907 9973 1841 2621 q 8563 3829 x 8621 6009 3291 2703 7399
Output (English): a, b, c, e, i, n, q, r, t, u, v, w, x