Task: Program Execution
Input (English): 9, 18, ['x', '8473', 'Q', '103', '8957', '357', '3155', 'r', '1693', '5833', '937', 'D', 'R', 'M', '9001', 'q', 'n', 'y']
Output (English): y, n, q, 9001, M, R, D, 937, 5833, 1693