In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 'F', '8135', 'Z', '9625', 'J', '8059', '539', 'O', '4487', '6907', 'y', 'v', 'V', 5641], ['G', 'd', '8135', 'Z', '9625', 'J', '8059', '539', 'O', '4487', '6907', 'm', 'l', 'c', 6785, 9691]