In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['B', 'L', 3509, 'I', 'g', 'u', 'i', '1459', 'g', '9611', '2749', 'L', 'a', 'z', 'K', '4409', 'n', 'J', 'q'], ['t', 'M', 's', 4895, 937, 'E', 1975, 4115, 'X', 'I', 'g', 'u', 'i', '1459', 'g', '9611', '2749', 'L', 'a', 'z', 'K', '4409', 'n', 'x', 'y', 'b', 'T', 3657, 6027, 'A', 5361, 9079, 'K', 8609]