In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[5475, 6639, 'Y', '9539', 'V', '8135', 's', 'U', 'f'], ['s', 7285, 'Y', '9539', 'V', '8135', 's', 'E', 1565, 'L', 'F']