In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4557, 3567, 1035, 7693, 8129, 3761, 'K', 'I', '1075', '9783', '2083', 'R', 's', 'r', 'A', 'y', 'S', 'Z', 'A', 'f', 'y', 'w', 'C', 'q', 7389, 3573, 'r', 159, 3319, 'b'], [9019, 'F', 'T', 6423, 'I', 'u', 4949, 'S', 'S', 'I', '1075', '9783', '2083', 'R', 's', 'r', 'A', 'y', 'S', 'Z', 'A', 'f', 'y', 'U', 735, 'I', 4791, 8501, 'x', 4973, 3909, 3799]