In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['m', 'g', 'f', 't', '1685', 'L', '9141', 'n', 'C', 'b', '6309', 'V', 'p', '4313', 'i', '4959', 'T', '6351', '4415', 'F', '5461', '7975', 'j', 'm', 5903, 1613, 6605, 5641, 'Y', 'm', 'B'], [4117, 'S', 'F', 7811, 'A', 'H', 6141, 'K', 'f', 't', '1685', 'L', '9141', 'n', 'C', 'b', '6309', 'V', 'p', '4313', 'i', '4959', 'T', '6351', '4415', 'F', '5461', '7975', 9193, 'k', 6541, 'f', 6023, 6053, 'L']