In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['h', 6679, 'o', 'X', '4461', '2635', 't', '63', '6305', 'I', 'c'], ['F', 'w', 'M', 's', 'f', 7211, 'o', 'X', '4461', '2635', 't', '63', '6305', 'Q', 3705, 'x']