Task: Program Execution
Input (English): 5903 r c 7739 5001 f m k 5173 k w m 9827 421 e p r d n i i r q u o v i 8477 9013 a 3299 4511 2991 7691 8899 3423 v l 5095
Output (English): a, c, d, e, f, i, k, l, m, n, o, p, q, r, u, v, w