In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7819, 6285, 'v', 'x', 6657, 9119, 341, 'T', 9331, 2211, 5757, 5791, 'z', 's', 7801, 6887, 'l', 'E', 'z', 'z', 'J', 'b', 661, 'g', 'd', '7451', '5585', 'y', 'k', '1595', '5761', 'X', '9849', 'j', '8173', '9811', '3003', 'X', '8547', 'c', '11', 'n', '5405', '6379', 'x', 'm', 'o', '541', '6837', '6359', 'H', 'w', 1679, 'f'], ['I', 8949, 4691, 'g', 'd', '7451', '5585', 'y', 'k', '1595', '5761', 'X', '9849', 'j', '8173', '9811', '3003', 'X', '8547', 'c', '11', 'n', '5405', '6379', 'x', 'm', 'o', '541', '6837', '6359', 'S', 'f', 'o', 'Y', 'N', 9377, 'W', 'M', 2457, 'n', 'p', 5309, 8017, 'Y']