In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 'O', 'B', 'k', 'g', 'H', '2345', '2303', 'x', '4773', '6875', '2433', '3805', '1767', 'j', '2825', 'J', 'R', 'J', 5551, 413], ['l', 'S', 'p', 'H', 'H', '2345', '2303', 'x', '4773', '6875', '2433', '3805', '1767', 'j', '2825', 'R', 5453, 9757, 'I', 6073, 4763, 'E', 'l', 1423, 'k', 'N']