In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['j', 'N', 'A', 489, 'r', '129', '7725', '6633', 'E', '6415', '8461', 'u', 'G', '8471', 'c', 'x', 'X', 'h', 465, 9503, 2915, 6681, 'D'], [6119, 8361, 647, '129', '7725', '6633', 'E', '6415', '8461', 'u', 'G', '8471', 'k', 'J', 2617]