In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[451, 'a', 1491, 'K', 3157, 'l', 2609, 7587, 9125, 4715, 'k', 'f', 469, 'x', 'Y', 'g', 'd', '7957', '3813', '3499', 'G', '8773', 'I', 'y', 'C', '7351', 'c', '8581', '6525', '3815', 'r', 'a', 6443, 'M', 'r', 9253, 9293, 635], [5265, 5931, 7313, 4549, 'w', 8753, 'Y', 'J', 'x', 'Y', 'g', 'd', '7957', '3813', '3499', 'G', '8773', 'I', 'y', 'C', '7351', 'c', '8581', '6525', '3815', 'P', 1103, 'W', 'F', 'O', 3647, 8621, 'V', 2737, 7135, 'M', 'i']