Task: Program Execution
Input (English): 15, 16, ['a', 'u', '7487', 'n', 'J', '7099', '5871', 'x', 'P', '2309', '4279', 'O', '7249', '8799', 'f', 'h', '3181', 'Z', '8949', 'L', '3409', '6687', '2441']
Output (English): hf