In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 2463, 3433, 'C', '2337', '9057', 'p', '9519', 'z', '9079', '1683', '9081', 'c', 6201, 'x', 't', 'y', 's', 1665, 'C'], [2969, 'J', 'n', 3669, 4401, 'P', 'C', '2337', '9057', 'p', '9519', 'z', '9079', '1683', '9081', 'r', 'T', 4487, 'O', 'G']