Task: Program Execution
Input (English): 9631 7945 v 5233 u 5053 l r 1191 n 7145 w x 9233 f v 3579 n 3559 d 2781 f a 1939 k q 8925 2993 7601 6483 x g 139 v 7193 3391 1397 3217 9949 3505 n
Output (English): a, d, f, g, k, l, n, q, r, u, v, w, x