In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[503, 'q', 'Q', 9949, 3507, 6989, 'I', 4879, 'w', 539, 7955, 'v', 'p', 2639, '9079', 'k', 'X', '7103', 'N', '7995', 'a', 'z', '3003', 'e', '6559', '3981', '249', '9099', '4195', 'j', 5623, 'u', 2565, 5315, 6767, 'd', 4657, 55], [9445, 'B', 'j', 783, 'T', 4787, '9079', 'k', 'X', '7103', 'N', '7995', 'a', 'z', '3003', 'e', '6559', '3981', '249', '9099', '4195', 'x', 'z', 7219]