Task: Program Execution
Input (English): 6629 d 1493 r 663 3449 i 3997 229 f t k f 3631 9755 l 9117 x 6921 u g f c 9719 1669 4517 77 1903 a 2927 j
Output (English): a, c, d, f, g, i, j, k, l, r, t, u, x