In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7445, 8407, '6947', 'F', '7979', '8131', 'C', 'O', 'Z', '4423', '6621', 'a', 679], ['p', 6199, 7601, 9207, 'E', '6947', 'F', '7979', '8131', 'C', 'O', 'Z', '4423', '6621', 'e', 5947, 6707, 'G', 'o', 'R', 'Y', 2223]