In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6535, 2969, 'K', 'C', 'u', 'J', 'n', 'j', '4605', 'y', 'I', 'Z', 'x', 'E', 9447, 'C', 5467], [4613, 1911, 'm', 'J', 't', 'z', 'n', 'j', '4605', 'y', 'I', 'Z', 'c', 'Q', 209]