In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['v', 8397, 'e', '4293', 'G', '7885', '5949', '2639', '5867', '4549', '3933', 'Z', '9315', 'b', 'a', 'j', 6705, 'L'], [6579, 'F', 'j', 3171, 6931, 'Y', 'e', 'c', '4293', 'G', '7885', '5949', '2639', '5867', '4549', '3933', 'Z', '9315', 'b', 'i', 'M', 9197]