In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'X', 'Q', 'U', '3775', 'l', '725', 'D', '3327', 'Q', 's', 'e'], ['d', 2207, 'J', 4519, 'T', '3775', 'l', '725', 'D', '3327', 'P', 'x']