In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9953, 4209, 803, 'P', 'u', 43, 359, 3133, 'U', 'y', '9575', 'j', 'R', 'H', 'v', 'G', 'N', 'c', 'n', 701, 9287], [4275, 7061, 'z', 'y', '9575', 'j', 'R', 'H', 'v', 'G', 'N', 'c', 'X', 4159, 211, 9291, 'B']