In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9417, 6541, 'V', 4095, 2535, 8271, 4253, 'r', 7251, 'F', 's', '5673', 'Q', '163', '591', 'G', 'm', 't', '7069', 'c', 'o', 't', 'q', '5595', 'D', 'Y', 'm', 3611, 'K', 7553, 'B', 'K', 'T'], ['P', 'r', 6361, 2773, 'r', 2627, 'F', 's', '5673', 'Q', '163', '591', 'G', 'm', 't', '7069', 'c', 'o', 't', 'q', '5595', 'D', 'f', 7923, 3733, 5271, 4083]