In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['z', 'L', 'e', 3279, 's', 'U', 'p', '2885', 'w', 'x', 7713], [3907, 'e', 's', 'U', 'p', '2885', 'w', 'F', 'x', 'v', 5319]