In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['i', 7635, 'o', 'j', 7991, 5827, 6007, 6675, 'r', '5111', 'Z', '4287', 'l', '603', '5203', '2811', 'd', '9123', 'n', 'b', '5171', 'X', '3249', '4235', 'E', 'h', 'F', 3845, 'X', 6141, 'D', 6405, 507, 7, 'L', 'f', 'm', 9, 4021, 937], [1321, 'n', 'x', 3489, 2419, 'N', 'q', 3285, 6631, 'U', 8757, 'E', 'u', 6509, '5111', 'Z', '4287', 'l', '603', '5203', '2811', 'd', '9123', 'n', 'b', '5171', 'X', '3249', '4235', 'E', 'i', 'E', 's', 6281]