In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 'e', 7507, 'F', '7177', '3635', '9979', '479', 'k', '3029', '3761', '8759', '5393', '8073', '9067', 'p', 'M', 'H', 'z', 'L', 9967, 7607, 'N', 'y', 7915, 'E', 'p'], [913, 6421, 'i', 'Q', 6451, 'L', 's', 87, 'h', 4627, 'Y', 'K', 'F', '7177', '3635', '9979', '479', 'k', '3029', '3761', '8759', '5393', '8073', '9067', 'p', 'M', 'H', 'z', 'R', 'h', 'G', 'C']