In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['y', 4203, 2793, 'F', 'Z', 'i', '8765', 'x', '993', 's', 'r', '7597', 'F', 'S', '2159', '4429', '6655', '2877', '1019', 'r', 'e', 'u', '9357', 'm', 'p', 'Y', 6611, 'T'], ['M', 6099, 'l', 'x', 'c', 9247, 'F', 7013, 6205, 'w', 'G', 5339, 4007, 'r', '8765', 'x', '993', 's', 'r', '7597', 'F', 'S', '2159', '4429', '6655', '2877', '1019', 'r', 'e', 'u', '9357', 'g', 'c', 1927, 'k']