Task: Program Execution
Input (English): 6, ['d', '2135', '4789', '7621', 'b', 'W', 'H', 'q', '6485', 'n', 'I', '8519', '3997', 'g', 'e', 'v', 'u', '7285', 'K', '37', 'a', '7437', 'e']
Output (English): d, H, 3997, K