In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['r', 3693, 'P', 4317, '1309', '1993', '8703', '3099', '3999', '3423', 'z', 'F', 't', '5213', 'r', 'l', 'N', '6443', '8819', '999', 'y', '763', '5411', 'V', 'K', '1829', 'Z', 'W', '8203', '4215', 'y', 'q', 'u', 8281, 1947, 9665, 'J', 'F', 7171, 'r'], [8071, 1741, 'p', 5421, 9257, 'g', 'e', 'S', 'z', 2339, 2895, 'R', 'o', 'g', 'z', 'V', 'S', 'J', 5015, 9915, 'j', 'd', 1447, 'o', 'y', 'a', '1309', '1993', '8703', '3099', '3999', '3423', 'z', 'F', 't', '5213', 'r', 'l', 'N', '6443', '8819', '999', 'y', '763', '5411', 'V', 'K', '1829', 'Z', 'W', '8203', '4215', 'y', 'K', 'J', 'a', 'Y', 2771, 2471]