In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['X', 889, 'K', 'Y', 6939, 'n', '8153', '8523', '1671', 'a', '8655', '5265', 'F', 'F', '6623', '5339', 'a', '4587', '7973', 'z', 'J', '3341', '8667', 'S', '4035', 'z', 'p', 'd', 169, 2539, 'w', 'w', 1379, 975, 'W', 'V'], ['l', 1379, 'n', 'H', 'R', 'r', 'y', 8965, 'F', 'n', '8153', '8523', '1671', 'a', '8655', '5265', 'F', 'F', '6623', '5339', 'a', '4587', '7973', 'z', 'J', '3341', '8667', 'S', '4035', 'e', 4331, 'p', 's', 9635, 6223, 't', 's', 'd', 7335, 'r', 8835, 'P', 'v', 2621]