In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4899, 5285, 2351, 'Z', 'v', 'O', '9971', 'C', '9081', '393', '2623', '915', '4569', 'g', 'Z', '7429', '7139', '2397', '5221', 'b', 'k', 'R', 'J', 7131, 6765, 'L', 5663, 'd', 'f', 'n', 6673, 'l', 3253, 9967, 4569, 1693], ['L', 'Z', 4827, 2533, 'H', 'H', 4143, 7819, 2979, 4999, 'L', 9125, 9129, 9609, '9971', 'C', '9081', '393', '2623', '915', '4569', 'g', 'Z', '7429', '7139', '2397', '5221', 'b', 'k', 'E', 'C', 'L', 'E', 6043, 5485, 'C', 3651, 'W']