In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['P', 1719, 3843, 1135, 6007, 5669, 5399, 7233, 't', 'L', '623', '7525', '2885', 's', 'v', '813', 'G', 't', 'F', 'e', '7891', '9541', 'K', 8461], [3285, 8769, 'q', 6301, 'X', 'Y', 't', 'L', '623', '7525', '2885', 's', 'v', '813', 'G', 't', 'F', 'e', '7891', '9541', 'i', 'p', 8343, 'C', 'x', 2613, 8875, 'E', 8257, 'E', 3027, 6997, 2433]