In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['S', 'g', 855, 6023, '673', '2433', '1223', '9073', 'y', 4555, 9547], [3795, 7513, 'm', 3899, '673', '2433', '1223', '9073', 'b', 191]