Task: Program Execution
Input (English): 3, ['P', 'b', '4899', 'b', 'p', '3851', 'x', 'K', '6551', '8971', '4687', 'I', 'J', 'X', '9503', 'T', 's', 'J', '2553', 'S', 'H', 'v', 'V', '7997', 'a', 'A', 'n']
Output (English): P, b, 4899