Task: Program Execution
Input (English): 4, ['509', 'W', '8345', '5231', '4925', 'z', 'D', 'j', '4939', '875', '249', 'y', '7117', 'M', 'l', '8757', '6057', '5349', '857', 'w', '1927', 'n']
Output (English): 509, W, 8345, 5231