In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 'D', 'm', 'l', '4935', 'w', '7215', 'r', '6921', 'U', '7411', 'a', 'w', 'h', 'E', '5043', 'L', '8009', 'I', 'p', 'o', '6963', '8689', 'J', 'L', 'J', 'i', 8915, 2757, 8373], [3017, 1543, 9457, 'd', 'f', 'J', 709, 2697, 7727, 'X', 'N', 'u', 6823, 'A', 'o', 'm', 'l', '4935', 'w', '7215', 'r', '6921', 'U', '7411', 'a', 'w', 'h', 'E', '5043', 'L', '8009', 'I', 'p', 'o', '6963', '8689', 'J', 'L', 'J', 'E', 'a', 'Y', 4991, 'k', 8109, 't', 'o', 'Y']