In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6919, 87, 'T', 'O', 'd', 'r', '8183', '737', '9725', 'I', '4551', 'p', '8769', 'K', '1255', '5309', 'o', '6573', '1585', 'S', 'J', 'Y', 6889, 't', 'S'], ['M', 2063, 'I', 'a', 7183, 9855, 'r', '8183', '737', '9725', 'I', '4551', 'p', '8769', 'K', '1255', '5309', 'o', '6573', '1585', 'S', 7259, 'L']