In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2477, 3199, 9259, 3117, 'i', '3021', 'n', '4171', '5083', 'J', 'v', '1399', 's', '499', 'H', 'U', 'H', '15', 'z', '9405', 'N', 'H', '7057', '9489', 'E', 'o', 'a', 67, 2139, 5087, 9423, 8561, 'h', 7817, 'm', 's', 'x', 'l', 9689], [2537, 'z', 'd', 'I', 'U', 'l', 8709, 'i', '3021', 'n', '4171', '5083', 'J', 'v', '1399', 's', '499', 'H', 'U', 'H', '15', 'z', '9405', 'N', 'H', '7057', '9489', 'E', 'o', 'E', 7693, 'U', 'w', 7559, 'W', 'T', 8333, 'V', 'g', 7247, 'n', 'v', 'K', 135, 'M', 's', 'X']