In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 5835, 'f', 'u', 'Y', 'N', 881, '2437', '7323', '1091', 'W', 'C', 'B', '7481', 't', 'y', 'C', 'j', '6207', 'S', 'h', 4709, 1485, 4145, 'j', 6335, 'f', 'G', 'T', 4093], ['r', 'I', 'M', 3735, 'H', 'c', 'L', 8793, '2437', '7323', '1091', 'W', 'C', 'B', '7481', 't', 'y', 'C', 'j', '6207', 'I', 8947, 801, 'l', 4297, 8537, 'I']