In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['k', 863, 'O', 'F', 5577, 9563, 4069, 'I', 865, 2889, 2769, 'X', 9329, 7521, 3435, 5541, 105, 'S', '8849', '9723', '5359', 'K', '4029', '8493', 'F', '2475', '9973', '4417', '7695', '8483', 'D', 'v', 'G', '1995', 'J', 'j', 'R', 3685, 2129, 'v', 87, 'x', 6367, 'u'], [6147, 8223, 'F', 'x', 3863, 'U', 'Z', 6295, 143, 2965, 9517, '8849', '9723', '5359', 'K', '4029', '8493', 'F', '2475', '9973', '4417', '7695', '8483', 'D', 'v', 'G', '1995', 'J', 'j', 'N', 2915, 7979]