In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 4785, 'I', 's', 'B', 'a', '1985', 'b', '2625', 'j', 'm', '7127', 'v', '6961', '7007', 'e', 'j', 'e', 8925, 'L', 1461, 5939, 9597], [6555, 'z', 5155, 8777, 803, 'S', 2539, 'b', 'o', 'M', 'x', '1985', 'b', '2625', 'j', 'm', '7127', 'v', '6961', '7007', 'e', 'j', 'R', 'r', 'G', 765, 'I', 3873, 'j', 'n', 'e', 8461]