Task: Program Execution
Input (English): 19, ['A', '9201', 'Y', 'b', 'o', '7573', 'B', '1637', '6779', 'x', '9771', '2851', '5145', '6829', '9907', 'K', 'Z', '4233', '1979', 'n', 'O', 'N', 'p', '6929', 'y', '6049', 'U', 'C', 'E', 'g', '6279', '1829', 'z', 'X', '6923', '5989', 'F', '5931', 'x', '4119', 's']
Output (English): A, n, x