In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 'Z', 5535, 'N', 'p', '9837', '8555', 'u', '2239', '4983', 't', '771', 'H', 'X', 'M', '5997', '93', 'i', 'J', 2157, 'a', 't'], ['l', 'z', 631, 'b', 'T', 'u', 7375, 'R', 'O', 'p', '9837', '8555', 'u', '2239', '4983', 't', '771', 'H', 'X', 'M', '5997', '93', 'R', 'r', 8803, 'y', 6661, 'w', 'd', 'd', 7781]