In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 1421, 'e', 9195, 'j', '4341', '3287', 'E', 'z', 'L', 'f'], ['K', 4493, 5039, 'j', 'j', '4341', '3287', 'E', 'z', 'C', 9721]