In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2413, 't', 'Z', 'h', '2973', 'B', '1147', '3911', 'z', 'b', 'x', '1511', '331', 'b', '5639', '945', '1193', 'y', '3453', 'n', 'O', 5671, 689, 'Z', 'z', 'q', 'K', 'O', 1219, 453, 'Z'], [9101, 'i', 'b', 'h', '2973', 'B', '1147', '3911', 'z', 'b', 'x', '1511', '331', 'b', '5639', '945', '1193', 'y', '3453', 'n', 'S', 7077, 9189, 7913, 3933, 't', 'H', 8623, 'o', 'q', 'p', 'H']