In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['m', 7695, 'a', 'k', 'c', '2251', 'M', 'j', 7557, 'n'], ['d', 6093, 'P', 'a', 'k', 'c', '2251', 'n', 'C']