In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2961, 7529, 'T', 671, 587, 143, 9757, '4293', 'N', '2511', '7281', 'g', 'j', '6009', '8973', 'W', 5043, 2835, 3383, 1797, 'n', 'w', 4835], ['a', 'm', 6471, 47, 't', 'Z', '4293', 'N', '2511', '7281', 'g', 'j', '6009', '8973', 'r', 'I', 7103, 7811]