In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['T', 'p', 4515, '2117', '7135', 'q', '3575', '2737', 'K', 'd', 'b', 'B', 'H', '6795', '7171', '2491', '1575', 'j', 'i', 'S', 2601, 7991], ['O', 8855, 2267, 3511, 'v', 843, 9971, '2117', '7135', 'q', '3575', '2737', 'K', 'd', 'b', 'B', 'H', '6795', '7171', '2491', '1575', 'K', 'k', 4373, 'a', 'F', 8647, 7399, 4761, 'd', 8483]