In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6577, 'd', 'i', 'r', 'I', '6459', 'W', 'n', 'u', '91', 'p', 7921, 'e', 9517, 1753, 'L'], [3367, 1963, 'q', 'S', 1969, 5419, 'o', 'r', 'I', '6459', 'W', 'n', 'u', '91', 't', 9891, 'Y', 'J', 'S', 'E']