In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['v', 6877, 'E', 'O', 'z', '1017', 'l', 'A', 'l', 3499], [7437, 9369, 1355, 'R', 'z', '1017', 'l', 'A', 'j', 'u', 7319]