In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['f', 'c', 'K', '7511', '4667', '4429', '9541', 'i', 'W', 'F', 7533, 3501], [4253, 'v', 'b', 1259, 3735, 8353, 'K', '7511', '4667', '4429', '9541', 'i', 'L', 'U', 'C']