Task: Program Execution
Input (English): 17, 18, ['3683', '3481', '8461', '4373', '7275', 'O', 'x', '7177', 'c', '1105', '7095', 'j', 'z', '3147', 'z', '5053', '957', 'X', 'P', '8945', '5053']
Output (English): 957