Task: Program Execution
Input (English): 1, 4, ['3391', 'K', '5887', '7435', '8761', '6583', 'V', 'x', 'R', 'P', '5823', '5721', 'Q', '473', 'e', 'X', '8131', 'r', '8447', '883', 'k']
Output (English): 3391, K, 5887, 7435