In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['x', 'V', 'S', 'J', 'x', 7683, 'o', 4745, 'm', 'u', 'L', 'G', '1505', 't', '2825', 'E', 'j', '8785', '9389', 'E', 'G', 'T', 'f', 8337, 'M', 1561, 'v'], [641, 'H', 'C', 5123, 'f', 'L', 'G', '1505', 't', '2825', 'E', 'j', '8785', '9389', 'E', 'G', 'T', 'v', 'U', 'R', 5707, 'u', 9481]