In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1937, 'O', 7245, 1689, 2021, 9351, 'f', 'R', 'V', 'w', '835', 'H', 'H', 'g', '33', 'W', 'P', 'a', '3973', '3291', 'a', '7597', '4025', 'g', 'H', '4611', 'g', '443', 'o', 'V', '2069', '1789', 'L', '8575', 'q', 'j', 'C', 'm'], ['E', 1667, 5441, 979, 3561, 'c', 'F', 'L', 'P', 'f', 'R', 'V', 'w', '835', 'H', 'H', 'g', '33', 'W', 'P', 'a', '3973', '3291', 'a', '7597', '4025', 'g', 'H', '4611', 'g', '443', 'o', 'V', '2069', '1789', 'L', '8575', 'y', 't', 5633, 6407, 7291, 'C', 't', 'V', 5329, 4581, 'v', 4787, 9205, 9771, 7795, 'v', 'z', 4241, 'M', 6703]