In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1615, 'B', 6037, 3147, 7057, 3371, 3065, 4695, 'A', 6021, 'y', '5769', '9435', '1837', 'U', 'p', 'w', 'f', '5545', '975', 'W', '1241', 'l', 'B', 'e'], [7215, 'I', 'X', 6723, 'O', 4467, 'H', 'y', '5769', '9435', '1837', 'U', 'p', 'w', 'f', '5545', '975', 'W', '1241', 'l', 'E', 'l', 9595, 903, 'h', 3147, 5515, 2511, 2179, 'l', 1759]