In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['W', 'p', 2609, 'p', 'm', 'i', 'b', '7419', '6579', '2275', '8535', '9873', 'v', 'Z', 's'], [3633, 'b', 4599, 'i', 'b', '7419', '6579', '2275', '8535', '9873', 'p', 2053, 'N', 'o', 'i']