In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3569, 'U', 7783, 'm', 'J', 549, 'P', 'N', '2423', 'z', '8087', 'J', 'R', 'D', 8823, 903, 'c', 5539, 'u'], ['b', 3361, 6567, 5203, 'P', 'N', '2423', 'z', '8087', 'J', 'R', 't', 'v', 'L', 'R', 'I']