In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['K', 2909, 829, 'H', 4665, 3013, 1429, 'M', 'a', 'f', 'r', 9347, 8943, 's', 'x', 'X', 6835, 'z', 2203, 'j', 933, '7009', 'p', '4787', '8423', '5077', '5765', '6785', '8175', '3507', 'o', 'F', 'T', '9951', 'm', '8293', 'Y', 'N', 'H', 'X', 'E', '4181', 'Y', 2119], [4869, 'P', 3573, 8661, 'O', 'u', 'e', 7465, 3581, 'P', 'H', '7009', 'p', '4787', '8423', '5077', '5765', '6785', '8175', '3507', 'o', 'F', 'T', '9951', 'm', '8293', 'Y', 'N', 'H', 'X', 'E', '4181', 'K', 7755, 5539, 933, 'p', 6309, 5319, 't', 2389, 2353, 'u', 7481, 3847, 'R', 'N', 1233, 5857, 'h', 'M', 'C', 'O']