In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9521, 'b', 'r', '9683', 'h', 'y', '3973', '5169', '5539', 'p', '5999', '4193', 'K', 'y', 9221, 2843, 8765, 4327], [8471, 39, 'e', 8873, 'E', 8913, '9683', 'h', 'y', '3973', '5169', '5539', 'p', '5999', '4193', 'K', 'u', 1875, 'o', 325, 4189]