In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2345, 3429, 'p', 859, '2247', 'L', '1167', 'f', 'l', 'f', '9643', 'a', '99', '671', 'u', 'J', 'r', '1615', '5103', 'v', '6543', 'g', '1391', 'P', 7045, 3117, 'L', 3243, 's', 'L', 'v', 2713, 'M', 'l', 'H', 'W', 829, 2685, 8925, 'F', 3263], [4285, 'P', 7019, 'a', 'Z', 'E', 'p', 'w', 4199, 3, '2247', 'L', '1167', 'f', 'l', 'f', '9643', 'a', '99', '671', 'u', 'J', 'r', '1615', '5103', 'v', '6543', 'g', '1391', 'Z', 1719, 'O', 'G', 'k', 'a', 791, 3583, 6783, 2185, 'W', 'J', 'Q', 3963, 'l']