Task: Program Execution
Input (English): 7, 21, ['y', 's', '7879', 'B', 'D', '2741', 'M', '1115', 'C', '1641', '3661', 'q', '8035', '9013', 'j', '8865', 'm', '9863', '5571', '571', 'U', '9669', 'C', '327', 'g', '1907', '1947']
Output (English): U, 571, 5571, 9863, m, 8865, j, 9013, 8035, q, 3661, 1641, C, 1115, M