In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['a', 1893, 'r', 4139, 677, 1993, 9549, 6855, 'G', 'r', 's', 'e', '6015', 'q', '6539', '241', '8913', '1411', '3331', 'j', '8675', 'c', 4053], [9581, 8015, 9135, 'Y', 'r', 's', 'e', '6015', 'q', '6539', '241', '8913', '1411', '3331', 'j', '8675', 'f', 1021, 4511, 'v', 's', 1691, 'V', 'M', 'U', 'N']