In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 'y', 4481, 'O', 5265, 'O', 'V', 3699, 'q', 'P', '4717', 'c', '7117', 't', 'l', 'k', 'G', 'W', 'H', '7425', '3493', 'H', '7907', 'Y', 'W', 'x', '4315', '8163', 'M', 'W', '7651', 'D', 'T', '3195', '3531', '7687', 'V', 2773, 'O', 'B', 7853, 3083], [1381, 'j', 4315, 7867, '4717', 'c', '7117', 't', 'l', 'k', 'G', 'W', 'H', '7425', '3493', 'H', '7907', 'Y', 'W', 'x', '4315', '8163', 'M', 'W', '7651', 'D', 'T', '3195', '3531', '7687', 's', 'k', 4959, 5719, 'h', 'a', 5897, 843, 'v', 299, 'M', 1695, 'a', 'A', 6157]