In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['e', 439, '9737', '9901', 'J', '4323', 'J', '3137', 'G', 'j', 4931, 7411, 'B', 'H', 'j', 7789], ['F', 'J', '9737', '9901', 'J', '4323', 'J', '3137', 'G', 'R', 'i', 'c', 'k', 'h', 'u']