In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1803, 'e', '5135', '879', 'w', 'd', '7639', '5861', 'K', '7165', 'z', 'f', 'L', '4409', 'e', 'W', 6959, 9153, 4881, 4997, 'a'], [7723, 'q', 'A', 'a', 4641, 3301, 9, 'S', 8237, 8281, 'g', 1467, 6709, '5135', '879', 'w', 'd', '7639', '5861', 'K', '7165', 'z', 'f', 'L', '4409', 'e', 't', 2283]