Task: Program Execution
Input (English): 11, 17, ['3809', 'a', '2877', 'I', '2827', '1551', 'a', '1639', '1741', '3759', '8507', 'D', '6965', '3229', 'v', 'k', '7975', 'K', 'I']
Output (English): 8507, D, 6965, 3229, v, k, 7975