In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['G', 'v', '3953', '2753', '1201', 'z', 'Q', 'f', 'n', 3757, 'B', 3715], [4623, 'K', '3953', '2753', '1201', 'z', 'Q', 'f', 'C', 'L', 'y', 6045, 7569]