Task: Program Execution
Input (English): ['x', 475, 6537, 'Z', '9531', '3957', 'b', 'k', 'D', 'a', 5213], ['R', 2807, 'O', 'Z', '9531', '3957', 'b', 'v', 'I', 'y', 'Z']
Output (English): Z, 9531, 3957, b