Task: Program Execution
Input (English): 2, 6, ['d', '5855', 'w', '8235', '8185', 'P', 'c', '8601', 'e', '309', 'D', '1509', '9525', '9391', '6081', '6453', 'c', '4309', 'y', 'U']
Output (English): 5855, 8601, 9391, U