In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'B', '6611', 'b', 'A', '2749', 'k', '8253', '1207', '7201', '8109', 'N', 'L', '1953', 'A', 'c', 's', 9613, 'y', 'p', 4981], [9369, 7179, 5125, 4199, 't', 'm', 'R', 'M', 's', 5873, '6611', 'b', 'A', '2749', 'k', '8253', '1207', '7201', '8109', 'N', 'L', '1953', 'u', 'D', 2369, 'x', 'j', 'm', 'z', 6185, 113, 'U', 5519, 'M']