In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['r', 2455, 'z', 'R', 5989, '9553', 'K', 'M', 'Y', 'H', '8777', '727', '3521', '5049', '6077', 'v', 'd', '2511', '5323', 'Y', 'T', 'b', 'D', 'L', 7077, 's', 5645, 'h', 4597, 'm', 6511, 'Y', 'd', 687, 'A', 5889, 'P', 'y', 'C', 7249, 9053], [7667, 4995, '9553', 'K', 'M', 'Y', 'H', '8777', '727', '3521', '5049', '6077', 'v', 'd', '2511', '5323', 'Y', 'T', 'b', 'D', 'P', 'r', 'X', 4419, 'p', 'd', 'H', 5257, 447]