Task: Program Execution
Input (English): 13, 15, ['a', 'H', '7025', 'J', 'K', 'e', '7977', 'Z', 'Z', '7577', '6673', '8911', '7703', 'W', 'O', '5389', 'q', '9363', '7121']
Output (English): 7703WO