Task: Program Execution
Input (English): 11, 15, ['F', '5371', '3647', 'x', '4073', 'P', 'f', '6463', '6285', 'W', 'B', 'D', 'g', '1903', 'X', '5945', 'Q', 'Y', 'v', 'B', '7237', 'j', 'A', 'E', '873']
Output (English): 1903