In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['o', 5261, 'R', 8999, 'G', 1965, 3921, 9539, 5343, 'c', 6119, '4617', '7787', 'P', '295', 'U', '1429', '7667', 'G', '8607', 'R', '7375', 'E', 'R', 'S', 6387, 'u'], ['B', 'X', 319, 1715, '4617', '7787', 'P', '295', 'U', '1429', '7667', 'G', '8607', 'R', '7375', 'E', 'R', 'T', 'Q', 3169, 'x', 'L', 'Q', 1161, 5639]