Task: Program Execution
Input (English): 4499 3093 t 5695 5299 5979 z 6791 8645 q y 6711 55 6073 v f a 1235 x 8007 k r 3065 n 9273 4963 a 9865 i d 3333 1457 8077 7017 t 3687 d u j
Output (English): a, d, f, i, j, k, n, q, r, t, u, v, x, y, z