In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Z', 6245, 'Z', 'b', 'M', 'Y', 9879, 'q', 8157, 'W', 'p', 'G', 'i', 'F', 'Z', 3725, 'r', '3915', '7275', 'm', '45', '9155', '8709', '2119', 'v', '3365', 'x', 'i', '2123', 'M', '4733', '2203', '4655', 'L', '8067', 'E', 'I', 'Y', 'C', 'y', 'X', 1933, 6891, 'N', 8497, 6745, 'T', 'n', 'F', 5947, 3861, 'S', 'H'], ['u', 6541, 2677, 'r', '3915', '7275', 'm', '45', '9155', '8709', '2119', 'v', '3365', 'x', 'i', '2123', 'M', '4733', '2203', '4655', 'L', '8067', 'E', 'I', 'Y', 'C', 'y', 'q', 8449, 6991, 'y', 769, 7143, 2849]