In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['q', 7939, 3181, 'q', 'X', 5321, 8423, 1131, 'h', 'm', '8723', '5807', 'u', '9037', '6483', 'a', 'H', 'A', '8615', '4159', '9745', '4785', 'E', 'R', 8069, 'I'], [1659, 6299, 3817, 't', 'E', 5463, 'b', 'm', '8723', '5807', 'u', '9037', '6483', 'a', 'H', 'A', '8615', '4159', '9745', '4785', 'E', 'x', 'v', 'm', 'z']