In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 'i', 'M', 'N', 8377, 'H', 7235, 'F', 3557, 'u', 'T', 'R', 1885, 'n', 1873, 'W', 7859, 4139, '427', '5535', 'h', 'z', 'D', 'd', 'H', 'X', 'f', '3867', '1665', 'n', 'x', '2789', 'i', 's', 'x', 'X', 'C', '2757', '383', '2651', 'K', 'r', 1753], [8121, 7381, 'f', '427', '5535', 'h', 'z', 'D', 'd', 'H', 'X', 'f', '3867', '1665', 'n', 'x', '2789', 'i', 's', 'x', 'X', 'C', '2757', '383', '2651', 'p', 'x', 7377, 'n', 3423, 10007, 7443, 'V', 757, 8113, 'l', 'Q', 'Y', 'A', 7523, 5051]