In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['W', 'w', 'k', 6197, 9707, 'm', 5309, 'e', '6683', 'a', '1527', '1897', '6709', '7627', 'p', '5613', '179', 'D', 'Y', 'e', 'G', 4215, 'w', 'n', 'a', 'u'], ['c', 739, 'q', 'P', 7413, '6683', 'a', '1527', '1897', '6709', '7627', 'p', '5613', '179', 'm', 6503, 'z', 91, 8981, 'k', 'm', 4061, 2149]