In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['x', 9373, '6407', '239', 'Y', '139', 'X', 'f', 'G', '8355', '3033', '137', '9887', 'P', 'Y', 'R', 'z', 'c', 'P', 7171, 3533, 9953, 'T', 't', 'X', 6753], [1117, 2049, 3451, 8505, 1825, 'X', 'M', 'g', 'b', 2321, 5775, 'b', 2149, '6407', '239', 'Y', '139', 'X', 'f', 'G', '8355', '3033', '137', '9887', 'P', 'Y', 'b', 't', 713, 'h', 'w', 5741, 1239, 'f', 'V', 'O', 3841, 2573]