In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['A', 'a', 'H', 5707, 'd', 'r', 'v', 'M', 'q', '7765', '1309', '6019', '817', '7061', 'w', 'c', '4893', '3593', 'Y', 'Y', 'P', '6985', '2343', 'b', 'j', '2993', '6025', '8063', '5383', 'C', 6279], [21, 1389, 'r', 'v', 'M', 'q', '7765', '1309', '6019', '817', '7061', 'w', 'c', '4893', '3593', 'Y', 'Y', 'P', '6985', '2343', 'b', 'j', '2993', '6025', '8063', '5383', 'y', 'j', 4125, 2001, 'G', 'X', 'e', 'S', 1459, 'z', 4195, 1257, 7445, 'r', 8813, 7575, 3723, 2057, 4263]