In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['u', 'V', 10005, 'R', 2921, 'b', 7419, 'd', 'r', 1357, 'E', 3441, 6955, 8747, 'U', 'd', 'W', '661', 'A', '1529', '2145', '8603', 'k', '9315', '4117', '5717', 'x', 'Z', 'P', '6759', 'r', '7409', 'P', '3963', 'R', 'q', '5043', 'x', 'M', 'o', 4269, 2013, 'X', 'B'], [4475, 'a', 2423, 6529, 'c', 'X', 'B', 'A', 7853, 'o', 5267, 3641, 6861, 'y', 'k', 'q', 9155, 9073, 'U', 'd', 'W', '661', 'A', '1529', '2145', '8603', 'k', '9315', '4117', '5717', 'x', 'Z', 'P', '6759', 'r', '7409', 'P', '3963', 'R', 'q', '5043', 'x', 'M', 'i', 3731, 'r', 6679]