In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[10009, 'a', 't', 'E', 'x', 'A', 'G', 'D', '3439', 'G', 'E', '5585', 'u', '2217', 'v', '8103', 'A', '4119', 'T', 321, 'd', 3131, 'r', 'O', 's', 'D', 'Q', 9299], [775, 6369, 't', 'E', 'x', 'A', 'G', 'D', '3439', 'G', 'E', '5585', 'u', '2217', 'v', '8103', 'A', '4119', 'O', 921, 'W', 'B', 9961, 'o', 'F', 5635, 'p', 'W', 'C', 'k']