In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['F', 'D', 'S', 'd', '5687', '4195', 'D', '4365', 'o', 'D', 'M', '9879', '6845', '779', 'y', 'V', 6451, 's', 'V', 6397, 8007, 3281, 'p', 5091], [8447, 7421, 4899, 'S', 545, 4921, '5687', '4195', 'D', '4365', 'o', 'D', 'M', '9879', '6845', '779', 'y', 'b', 'R', 5717, 'o', 2667, 8537, 'S', 9753]