In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['A', 'K', 7673, 'U', 'L', 'r', 'W', 'X', 2441, 8921, 2999, 'u', 'o', 'p', 773, 'h', 4939, 7861, 'p', 4371, 555, 7419, '8765', '53', 'L', '4247', 'd', 'A', 'U', 'R', '5479', 'H', 'G', '2111', '7865', 'b', 'Q', 'Z', '7559', 'A', 'd', 'L', 'y', 'f', 'y', 'L', 'K', 'B', 6429], [1941, 't', 1289, '8765', '53', 'L', '4247', 'd', 'A', 'U', 'R', '5479', 'H', 'G', '2111', '7865', 'b', 'Q', 'Z', '7559', 'A', 'd', 'L', 'y', 'f', 'y', 'Z', 't', 'G', 8483, 3551, 'i', 3601, 9641, 3451, 4835, 'd', 4157, 'C', 7229]