In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6995, 'X', 'd', 'f', 8653, 3195, 7209, 'X', 'R', 'D', 'S', 'X', '4785', 'B', '4679', '9285', '4905', 'S', 'u', 'b', 2595, 3569], [4921, 'g', 4409, 'l', 2795, 'X', 'R', 'D', 'S', 'X', '4785', 'B', '4679', '9285', '4905', 'S', 'u', 'y', 5275, 8579, 'T', 'Z', 'N', 1963, 'L', 3143, 'c']