In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'm', 'R', 's', '1737', '169', 'v', '7069', 'x', 'H', 'P', '405', '1859', 'm', '3875', 'A', '6491', 's', 7173, 'c', 'Y', 4359, 'g', 2835, 't', 'B', 9407, 5509, 479, 'e'], ['I', 'q', 913, 'S', 2569, 1821, 'I', 9733, 'g', 'L', '1737', '169', 'v', '7069', 'x', 'H', 'P', '405', '1859', 'm', '3875', 'A', '6491', 'N', 4141, 3575, 'Y', 9967, 'Z', 455, 2867, 'e', 4339, 'q']