In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8397, 'y', '7037', '8401', '1923', '5473', 'T', 7211, 7635, 4811], [6807, 3961, '7037', '8401', '1923', '5473', 'a', 'e', 4179]