In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['N', 6797, 753, 'K', 'R', 1073, 'B', 3481, 9491, '2763', '237', 'm', '639', 'V', 'I', '601', 'f', 'o', 'd', '1831', 'l', 'g', 7891, 7313, 'K', 't', 7743, 3025, 4711, 6783], [3817, 'G', 'J', 9537, '2763', '237', 'm', '639', 'V', 'I', '601', 'f', 'o', 'd', '1831', 'W', 7953, 3579, 9327, 3059, 9417, 'H']