In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['R', 5117, 'l', 2907, 9443, 't', 2821, 'o', 'Z', 'E', 5821, 'V', 'Z', 4593, 9051, 8921, 'w', 8309, '673', 'z', '8179', 'n', 'F', '2671', 'G', '7729', '7265', 'P', '6409', '4849', '2835', 'S', 's', 'U', 'I', 'J', 'B', 'q', 9769], ['e', 2349, 4297, 'h', 3705, 147, 'F', 3029, 2981, 'z', 'l', '673', 'z', '8179', 'n', 'F', '2671', 'G', '7729', '7265', 'P', '6409', '4849', '2835', 'S', 's', 'U', 'I', 'J', 'B', 'B', 'K', 5641, 6077, 6773, 4787, 8387, 7633, 'c', 2413, 1757, 'T', 3895, 1971, 'u']