In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['A', 'Y', 'B', 5539, 'i', 'u', 3953, 7153, '3019', '4737', 'Q', 'Z', '223', '7501', '1205', 'u', 'F', 'i', 4673, 5277, 2169, 'v'], [7917, 'p', 'K', 'D', 'S', 'U', 'w', '3019', '4737', 'Q', 'Z', '223', '7501', '1205', 'u', 'd', 8111, 'Q', 'b', 7059, 'L', 'u', 5107]