In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['R', 1061, 7757, 'b', '443', 'W', '1023', '2759', 'Q', 'u', 'l', 'Y', 'Y', '1281', 'p', 'o', 4113, 'W', 'a'], ['l', 'r', 'N', 2075, 'o', '443', 'W', '1023', '2759', 'Q', 'u', 'l', 'Y', 'Y', '1281', 'p', 'd', 'h', 781, 5699, 1717, 6813, 8599, 'c', 'S', 4727, 'z']