In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['x', 5751, 1283, 5483, 'Y', 'U', 'm', 5151, 9153, 'l', 'S', 8309, 'A', 'Y', 'B', 'K', 'Y', '1145', 'U', '8493', 'q', '5741', 'L', 'h', '4859', 't', '9069', 'E', 'q', '55', '1669', '5531', 'I', '451', 'K', 'f', 'C', 8463, 'r', 7617, 4451, 'f', 's'], ['Y', 'd', 3637, 'Q', 'A', 'z', 5459, 9883, 5499, 'o', 721, '1145', 'U', '8493', 'q', '5741', 'L', 'h', '4859', 't', '9069', 'E', 'q', '55', '1669', '5531', 'I', '451', 'v', 'W']