In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1751, 8745, 3275, 'v', 'D', '5625', '7967', '6157', 'a', 'f', 'l', 't', 'b'], ['a', 'a', 1569, 5871, 'D', '5625', '7967', '6157', 'a', 'z', 'p', 'm', 's', 'U']