In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 511, 7083, 463, 'S', 5697, '3', '2555', '9503', '2007', 'p', '9907', 'U', 'J', '7087', 'f', '7943', 'e', '933', '4171', 'q', '1895', 'Z', 'G', 'b', '9837', 'r', 'J', 'R', 'd', 'C', 'd', 'f', 'Z', 7017, 'e', 7127, 'D', 9169, 'b', 'q', 'x', 1005, 4539, 'c', 4499, 53, 'c', 1877, 6963, 4715, 6619, 3099, 'a', 8681, 'i'], [2847, 7309, 'z', 'H', 't', 'r', 9413, 'm', 'W', 'K', 'N', 3727, 'B', 'u', 2533, 7149, 4317, '3', '2555', '9503', '2007', 'p', '9907', 'U', 'J', '7087', 'f', '7943', 'e', '933', '4171', 'q', '1895', 'Z', 'G', 'b', '9837', 'r', 'J', 'R', 'd', 'C', 'd', 'f', 'f', 'a', 'r', 4459, 1677, 'U', 'X', 'h', 'F', 799, 7797, 'U', 'd', 'S', 5295, 'm', 'D', 'B', 7871]