In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7145, 7533, 4291, 'X', 995, '1779', '9479', 'l', '6657', 'X', '1949', '983', '8465', 'J', '5415', 'O', 'W', '1441', 'H', 'G', 'F', 'E', 3381, 3647], [2741, 1293, 'X', 'k', 'M', 'd', 'b', '1779', '9479', 'l', '6657', 'X', '1949', '983', '8465', 'J', '5415', 'O', 'W', '1441', 'H', 'G', 'F', 'h', 9493, 'r', 'M', 'H', 'D', 'y', 'm']