In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Q', 't', 'b', 'G', '89', 'B', 'H', '1243', '7169', 'N', 'h', 'i', 'X', '903', 'y', '2975', 'I', 'n', 7293, 8679, 2933, 9947, 'l', 'Q'], ['E', 'a', 's', 'U', 2009, 'z', 'K', 97, 'q', 9277, 391, 5119, 6297, 'K', 'b', 'G', '89', 'B', 'H', '1243', '7169', 'N', 'h', 'i', 'X', '903', 'y', '2975', 'a', 'T', 9403, 'V', 5721, 397, 3299, 1461, 6917, 'U']