Task: Program Execution
Input (English): u m w a p 2507 w e q 2821 a 7163 l 3187 9875 m p 3001 d 1579 r 675 75 e 6015 4673 1207 7993 n z 7295 a 6677 m x 4497 x 9705 u
Output (English): a, d, e, l, m, n, p, q, r, u, w, x, z