In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9483, 'Z', 'z', 6897, 't', 'X', '2849', 'N', '6541', 'S', '2547', 'M', '6955', 'G', 's', '7865', '997', 'j', '9909', 'd', 777, 6437, 5267], [7263, 683, 9549, 8261, 4211, 'F', '2849', 'N', '6541', 'S', '2547', 'M', '6955', 'G', 's', '7865', '997', 'j', '9909', 'Y', 'i', 'U', 'K', 'X', 8901, 2397, 's']