Task: Program Execution
Input (English): 4323 9027 3191 k k f 1535 3883 d j 7717 4829 v z q 1621 t 2777 9091 a 7307 w n 7591 f l e t q r 5143 9791 121 g y 6567 u l 1749
Output (English): a, d, e, f, g, j, k, l, n, q, r, t, u, v, w, y, z