In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'e', 'X', '213', 'w', '2319', 'B', 'X', 'D', 'U', '5595', 'b', 'n', '3489', 'K', '2495', '3539', 'u', '3479', '6863', '3327', '1435', '6799', 'y', 'K', 2399, 6973, 7375, 'D', 3139, 'Y', 'W', 'P', 1939, 'n', 'e'], ['l', 2447, 6567, 'j', 'X', '213', 'w', '2319', 'B', 'X', 'D', 'U', '5595', 'b', 'n', '3489', 'K', '2495', '3539', 'u', '3479', '6863', '3327', '1435', '6799', 'I', 'H', 283, 't']