In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2719, 673, 2169, 't', 'T', '7197', 'u', 'X', '4721', 'Z', 'c', 'j', 'Q', 3553, 6337, 'V', 9389, 5647, 3925, 'k'], ['p', 'e', 6497, 'G', 'f', 'd', 'T', '7197', 'u', 'X', '4721', 'Z', 'c', 'j', 'j', 'M', 'd']