In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 9023, 'A', 1153, 'b', 'C', '4135', '8883', '321', 'U', '6911', '3805', 'r', '7867', 'c', '387', 'o', 'N', 'S', 'n', 'w', 'b', 3255, 10007, 3409], ['W', 'c', 8011, 'i', 127, 1485, 'C', '4135', '8883', '321', 'U', '6911', '3805', 'r', '7867', 'c', '387', 'o', 'R', 'h', 'x', 'Y', 8365, 3143, 4739, 1955, 'L']