Task: Program Execution
Input (English): f n 1201 w 5271 5821 6297 8133 279 k 6969 s u 7187 g r f t 5103 v e d 7845 v i w e 8257 d z u 7923 x 761 k 2607 x
Output (English): d, e, f, g, i, k, n, r, s, t, u, v, w, x, z