In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['M', 2061, 9911, 'e', 'Y', 2131, 't', 'y', '3139', '3537', 'r', '6967', 's', '2005', 'X', 'G', 'k', 'E', 'u', '7401', 'n', 'U', 6665, 'Q', 5499], [5479, 961, 2075, 1799, 'R', 'y', '3139', '3537', 'r', '6967', 's', '2005', 'X', 'G', 'k', 'E', 'u', '7401', 'I', 'S', 785, 'x']