In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['c', 175, 5321, 3301, 'Q', 417, 835, '8417', '2043', 'B', '1523', 'C', 'i', 'd', 'J', 'u', 'l', 'z'], [2323, 'a', 5135, 'b', 'U', 'I', 'E', '8417', '2043', 'B', '1523', 'C', 'i', 'd', 'W', 3867, 915, 5983, 'r', 6435]