In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[5649, 'Y', 7867, 3803, 'l', 'A', '1253', '5287', '9635', '1689', 'j', '3859', '4733', '8675', 'k', '5907', 'o', 'U', 9959, 9835, 7275, 'h', 't', 7547], [4531, 1823, 8521, 'b', 'c', 'e', 8199, 'I', 'l', 'A', '1253', '5287', '9635', '1689', 'j', '3859', '4733', '8675', 'k', '5907', 'n', 'E', 7515, 3535, 5615, 4699, 115, 'k', 'W']