Task: Program Execution
Input (English): 10, 12, ['P', '9937', 'A', 'a', 'e', '499', 'W', '8903', 'G', 'v', '531', 'm', 'r', 'c', 'V', 'K', '4923', '2599', 'd', '3787']
Output (English): m531v