Task: Program Execution
Input (English): 18, 20, ['U', '7165', 'M', 'O', 'C', '5801', 'a', 'X', '5651', '4939', '3535', '4385', '8175', 'a', '1919', '709', '9639', 'W', 'w', 'b']
Output (English): 0