In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['l', 2501, 2275, 4307, 3829, 'f', 'o', 'v', 9621, 'o', 5757, 'd', 3507, 9479, 7641, 'g', 't', 'A', 'i', '8233', 'L', 'o', 'b', '9233', '9979', 'A', '6583', '5233', '9557', 'J', 'h', '637', 'y', 'H', '3043', 'z', 'd', 2441, 'U', 4565, 157, 9287, 'g', 'V', 9771, 'j', 9557, 'P', 'S', 'n', 'Y'], [3651, 1497, 'K', 'E', 4181, 9511, 969, 'y', 923, 't', 'A', 'i', '8233', 'L', 'o', 'b', '9233', '9979', 'A', '6583', '5233', '9557', 'J', 'h', '637', 'y', 'H', '3043', 'z', 'A', 671, 4113, 7653, 't', 'W', 'S']