In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['B', 6437, 3527, 'Y', '1695', 'B', 'R', 'x', 'e', 'O', 'g', 2193], ['D', 1523, 'e', 'Y', '1695', 'B', 'R', 'x', 'f', 'w', 6291, 'o', 'D']