In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['y', 'l', 'T', 1281, 1197, 'D', '7433', 'y', 'U', 'd', 't', 'k', 'Z', 5813, 3423], ['p', 9749, 'i', 'h', 'D', '7433', 'y', 'U', 'd', 'q', 'b', 'I', 1669, 3167]