Task: Program Execution
Input (English): 1, ['6431', 's', '4531', 'D', 'H', 'C', 'R', 'w', '5721', 'w', '6395', 'l', 'U', 'B', 'N', 'U', '3367', 'Y', '4809', '2217', '6189', '5407', '9829']
Output (English): 6431