In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['M', 5717, 6817, 7473, 2257, 803, 8935, 'U', 'l', 'T', '4203', '657', 'F', 'F', '7983', 'e', '7267', '7305', 'k', '2499', '6413', 'K', 'Z', '1535', 'w', '2117', 'Q', 'q', 4557, 'E', 'j'], [4391, 6617, 2715, 'M', 'e', 'V', 5327, 'n', 'q', 1541, 'a', 4215, 91, 'R', 'q', 1285, 'T', 4027, 'U', 'l', 'T', '4203', '657', 'F', 'F', '7983', 'e', '7267', '7305', 'k', '2499', '6413', 'K', 'Z', '1535', 'w', '2117', 'n', 'd', 'L', 'a', 'L', 613, 'D']