Task: Program Execution
Input (English): 11, 15, ['2991', 'K', 'A', '6865', 'a', '3209', 'l', 'q', 'W', '6433', 'X', '9749', '5249', '1371', '8341', '8457', 'P']
Output (English): X, 9749, 5249, 1371, 8341