In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['u', 4637, 'h', 2259, 'M', 'i', 'h', 'X', 7083, 'o', 't', 9421, 't', 785, 'Y', 'Y', '5531', 'P', 'x', 'b', '4899', 'Y', '8909', '7749', 'k', '4049', '1237', 'M', '8579', 'N', '3167', '9123', '6973', '4981', 'I', '7231', '9783', '9823', 'c', 'e', '7169', '4003', 'C', 8237, 9899, 'M', 3217, 4903, 'I', 5279, 'T', 6849, 3373, 'x', 'S', 'l', 8665, 'V', 'v', 'I', 'A', 'E', 4367, 9513, 'i', 2897, 3433, 8091, 5011], [5327, 4587, 'E', 'w', 4287, 'W', 3339, 2729, 'q', 'Y', '5531', 'P', 'x', 'b', '4899', 'Y', '8909', '7749', 'k', '4049', '1237', 'M', '8579', 'N', '3167', '9123', '6973', '4981', 'I', '7231', '9783', '9823', 'c', 'e', '7169', '4003', 'p', 7351, 4915, 4485, 7747]