In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['F', 847, 'D', 2433, 6905, 'e', 3731, 'w', '3437', '3435', 'q', '2279', 'E', '9491', 'x', 'j', 'S', '9905', '7315', 'L', 'P', 'o', 'G', 'i', 3411, 'Q', 9143, 'z', 4103, 'u', 9785, 'F', 9681, 2887, 5811, 7537], ['i', 't', 'f', 'b', 4159, 7285, 2465, 9639, 'w', '3437', '3435', 'q', '2279', 'E', '9491', 'x', 'j', 'S', '9905', '7315', 'L', 'P', 'o', 'I', 1239, 'n']