Task: Program Execution
Input (English): 18, ['B', '6739', 't', 't', 'x', '8371', 'K', 'e', 'B', '4087', 'h', '1311', 'V', '7071', '9169', '4465', '9443', '7339', '5979', '7565', '8743', 'l', '8291', 'd', 'A', 'd', 'R', '6809', 'Q', 'J', 'X', 'U', '2891', '5595', 'c', 'x', 'u', '8977', '1121', '5203']
Output (English): B, 5979, u