In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[637, 'E', 5987, 9993, 'k', 'a', 9427, '999', '2991', '3075', '7615', '5135', 'X', 'K', '8209', 'o', 'O', 'n', 'Y', '7247', 'F', 'x', 'S', '7741', '1611', 'h', 4895, 7311, 4737, 2453, 5595, 'b', 509, 's', 'Y', 'a', 'F', 'o', 2335, 133], ['W', 'q', 'h', '999', '2991', '3075', '7615', '5135', 'X', 'K', '8209', 'o', 'O', 'n', 'Y', '7247', 'F', 'x', 'S', '7741', '1611', 'Y', 6587, 'I', 'f', 'Q', 'B', 8691, 'l', 'N', 1495, 2945]