In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['S', 'Q', 'G', 'H', 'v', '6247', 'n', 'W', '9609', '4901', 'M', 6973, 'C', 6827, 'l', 9169], [7211, 'F', 's', 1487, 'G', 'H', 'v', '6247', 'n', 'W', '9609', '4901', 't', 27, 'H', 2817, 6249, 'c', 545, 6093]