In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['e', 615, 'z', '6745', '1441', '7019', 't', '4799', '7267', 'O', 1251, 4375], [1303, 'f', 'j', 3719, 'z', '6745', '1441', '7019', 't', '4799', '7267', 'b', 'e', 'n', 6981, 8195]