In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['A', 8673, 'n', 'C', 'H', 'P', 'e', 'e', 't', 8547, 2569, 7383, 7145, 8601, 2749, 2511, '5407', 'F', 'J', '8845', '4939', '3709', '8895', '7081', '9401', '9753', 'D', 'r', 'o', 'U', 'P', 'W', 'G', '4153', '4569', 'C', '5967', 'f', '2879', '4667', 'U', 'T', 39, 9717, 253, 'Y', 10003, 'Z', 7683, 7883, 'r', 439, 6285], ['K', 'E', 'A', 9743, 'E', 9289, 4289, 423, 'G', 'e', '5407', 'F', 'J', '8845', '4939', '3709', '8895', '7081', '9401', '9753', 'D', 'r', 'o', 'U', 'P', 'W', 'G', '4153', '4569', 'C', '5967', 'f', '2879', '4667', 'y', 'r', 8445, 'q', 7921, 'C', 'i', 2353, 5143, 'U', 'g', 9433, 3547, 'B', 'P', 409, 1209, 'l']