In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Z', 1843, 'u', 863, 'y', 'H', '6811', '9025', '1173', 'x', 't'], [5715, 3439, 1025, 10007, 'y', 'H', '6811', '9025', '1173', 'v', 2945, 'V', 'g']