In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6463, 'B', 'n', '4053', 'h', '7093', 'E', '4853', 'U', '891', '2391', 'o', 'u', 'X', 'c', 7371, 'e'], [2029, 8945, 'F', 2299, 7397, 1829, 'n', '4053', 'h', '7093', 'E', '4853', 'U', '891', '2391', 'o', 'u', 'X', 'l', 'l']