Task: Program Execution
Input (English): 2401 k o 2537 c r e a 1923 1739 531 k 8221 2353 o u 6079 j 351 9133 7115 3805 c 2367 7693 2509 8035 o q f w z i
Output (English): a, c, e, f, i, j, k, o, q, r, u, w, z