Task: Program Execution
Input (English): 5, ['a', 'a', '3961', '9489', 'b', '1505', 'W', '8567', '635', 'z', 'a', '139', '3987', 'C', 'D', '3401', 'l']
Output (English): a, a, 3961, 9489, b, 1505, W, 8567, 635, z, a, 139