In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[5693, 4333, 'C', 2775, 'c', 'k', 2923, 2851, '4009', 'M', '8837', '3599', 'r', '6433', 'j', 'J', '8575', 'l', 'u', 't', 'R', 4575, 9345, 4967, 4569, 9803, 5221, 'i'], ['u', 't', 2845, '4009', 'M', '8837', '3599', 'r', '6433', 'j', 'J', '8575', 'l', 'u', 't', 'G', 'K', 1825]