In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['F', 'C', 'u', 'F', 'J', 'x', '7269', 'P', 'r', 'k', 'X', 'd', 871, 347, 'd', 4167, 437, 8619], ['c', 8807, 'h', 5745, 1083, 'k', 'F', 'J', 'x', '7269', 'P', 'r', 'k', 'X', 'k', 6763, 'E']