In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 9227, 9923, 7577, 8169, 'k', 'B', 'L', 6329, '4183', '5427', '255', 'Y', 'C', 'g', 'I', 'J', '6847', 'D', '2735', 'X', 'Y', 'M', 7749, 'm', 4159, 'C', 3319, 9363, 2283, 'm', 4571, 'e'], ['u', 'Z', 'r', 1503, 'G', 9799, 'z', 'F', 'b', 'N', '4183', '5427', '255', 'Y', 'C', 'g', 'I', 'J', '6847', 'D', '2735', 'X', 'J', 7431, 3855, 4535, 6657, 8809, 7885, 'U', 1753, 3423]