In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 1987, 'l', 4097, 's', 'g', 'v', 'J', '9425', 'g', 'd', '8091', '2115', 'E', 4889, 3599, 'L', 8575], [5389, 'l', 9905, 'v', 'J', '9425', 'g', 'd', '8091', '2115', 'w', 'T', 6561, 'U']