In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['U', 637, 'o', '3327', 'A', '7495', 'i', 'b', '2067', '5555', '3619', '1697', 't', 3715, 'Q'], ['u', 921, 4467, 2095, 345, 'b', '3327', 'A', '7495', 'i', 'b', '2067', '5555', '3619', '1697', 'E', 7935, 'B', 6341, 'N', 'V', 7655]