In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4737, 'J', 3261, 'y', 'L', '4969', 'k', '5145', '8425', 'V', 'Q', 'V', 5723, 8123, 9979], [4449, 2341, 7137, 6709, 'T', 'a', 'y', 'L', '4969', 'k', '5145', '8425', 'V', 'Q', 'v', 3993, 2881, 'J']