In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 3815, '7171', 'I', 'm', '3035', 'a', 'V', 2889, 'm'], [5911, 4525, 'R', 133, '7171', 'I', 'm', '3035', 'P', 'W', 'f', 4045]