In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['K', 'V', 9431, 'j', 5399, 7027, 'E', 's', 'w', 't', '6117', '3083', '6835', 't', '1535', '7597', '5207', 'U', 'S', 6355, 7233, 8541], [3897, 'a', 6765, 647, 's', 'w', 't', '6117', '3083', '6835', 't', '1535', '7597', '5207', 'A', 907, 5489, 6879, 'Q', 5347, 'b', 9521, 69, 'h']