In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['W', 'N', 'X', 421, 8311, 3141, 'n', 'e', 'R', 5179, 5211, 'k', 'k', 2179, 6847, 9051, 'b', 3537, 1907, 'c', 449, 7343, 'Y', 'F', '4301', '6857', 'i', '3077', '2451', 'S', 'K', 'x', 'W', '4281', 'j', '3623', 'd', '3787', '1419', '5775', 'c', '9989', '3647', '2715', '5127', 'U', 'q', 'b', '6471', 'D', 'h', 4631, 'D', 2347, 549, 'e', 'H', 'x', 'V', 6981, 1353], ['R', 'L', 'a', 2583, 'V', 9827, 'S', 9751, 'S', 'v', 1861, 8123, 'D', 9013, 7559, 2681, 7477, 'Z', 9707, 'H', 919, 'F', '4301', '6857', 'i', '3077', '2451', 'S', 'K', 'x', 'W', '4281', 'j', '3623', 'd', '3787', '1419', '5775', 'c', '9989', '3647', '2715', '5127', 'U', 'q', 'b', '6471', 'D', 'P', 7065, 5591, 'E', 'Z', 'a', 'H']