Task: Program Execution
Input (English): 7, 9, ['4539', 'A', 'G', 'n', 'k', 'I', 'k', '4231', '4171', 'x', 's', '8357', '7877', '7125', '1529', 'v', 'a', '2645']
Output (English): k, 4231, 4171