In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'x', 'm', 9753, 1473, 'j', 'N', 2651, '8973', 'z', 'j', 'b', '5941', '1409', '9191', 'f', '8931', 'S', '9683', '7915', '9027', '3531', 'k', 9255, 9241, 9533, 'U', 4149, 'e'], [3779, 'm', 551, 'v', 'f', 159, 6911, 3807, 'P', 'A', 5483, '8973', 'z', 'j', 'b', '5941', '1409', '9191', 'f', '8931', 'S', '9683', '7915', '9027', '3531', 'b', 393, 'n', 493, 'x', 4409, 5253]