In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['d', 6717, 1947, 'n', 8773, 'E', 7607, 1719, 6751, 'L', 't', '3149', 'y', '7897', 'L', 'J', '9557', '6413', 'H', 'q', '3055', '5967', '9411', '7869', '8277', '7533', 'H', '9713', '5981', 'a', '2937', 'k', 7289, 9515, 'G', 'q'], ['W', 8869, 't', 3453, 9177, 'G', 'M', 5171, 'O', 'C', 5097, 'H', 'M', 'U', 4167, 3051, 7487, 7483, 4945, '3149', 'y', '7897', 'L', 'J', '9557', '6413', 'H', 'q', '3055', '5967', '9411', '7869', '8277', '7533', 'H', '9713', '5981', 'a', '2937', 'C', 9799, 6659, 's', 6881, 'w']