In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['c', 7387, '4905', '999', '5697', 'G', '9975', 'f', 'I', '2807', '6785', '7473', '9999', '8011', 'W', 'i', 'A', 7573], ['K', 'g', 'b', 'u', 7899, 'k', 's', 223, '4905', '999', '5697', 'G', '9975', 'f', 'I', '2807', '6785', '7473', '9999', '8011', 'h', 7411, 83, 'T', 9199, 't', 9245]