In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[5405, 7013, 6633, 'B', 'E', 'y', 'r', 'W', 'v', 8987, 4897, 'l', 7375, 4785, '7255', 'l', '4017', 'U', 'O', 'X', '4395', 'Q', '55', 'f', 'B', '4799', '6031', 'o', 'F', '7805', 'h', 'a', 'M', 'V', 6833, 2613, 'z', 'G'], [2747, 'B', 4531, 6319, 'N', 2169, 'g', 4795, 3653, 'i', 5163, 'x', 9813, 2597, 'a', '7255', 'l', '4017', 'U', 'O', 'X', '4395', 'Q', '55', 'f', 'B', '4799', '6031', 'o', 'F', '7805', 'a', 'B', 'u', 2997, 'X']