In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['v', 'I', 'Z', 2797, 657, 'W', 'A', 'Z', '5457', 'p', 'l', 't', 'p', 'g', 'i', 'F', 'Q', 'R'], ['y', 'v', 2457, 265, 9839, 'u', 'A', 'Z', '5457', 'p', 'l', 't', 'p', 'z', 'V']