Task: Program Execution
Input (English): d a 6931 c u z 9713 v m e k o 9705 a 5373 c 2983 8097 h 3039 g f n v 853 8227 7573 j h k o k 8897 d g d d 4039
Output (English): a, c, d, e, f, g, h, j, k, m, n, o, u, v, z