In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 'h', 'b', 805, 'J', 2121, 'd', 'q', '2065', 'X', '2861', 'q', 'D', '9507', 'j', 'c', 'j'], ['U', 10023, 533, 6969, 'q', '2065', 'X', '2861', 'q', 'D', '9507', 'R', 5755, 4731, 'w', 'L']