In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8715, 4973, 'X', 'r', 827, 'T', 'j', '1211', 'N', '7625', 'a', '4169', 'm', '713', 'Q', '2325', '8303', 'H', 'X', 'u', 'B', 'l', 'o', 9511, 9553, 1077, 'n', 'W', 3845, 2871, 'F', 4987, 6167], [7907, 'k', 'L', 'j', '1211', 'N', '7625', 'a', '4169', 'm', '713', 'Q', '2325', '8303', 'H', 'X', 'u', 'B', 'l', 'Y', 7423, 'I', 9243, 4655, 5269, 'D', 1407, 'P', 4343, 'T', 'C', 'i', 'F']