In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['S', 'p', 'h', 'f', 'U', 'S', 'O', 5093, 1135, 'N', 'x', 't', 'd', '9315', '7853', 'm', 'c', '3721', '371', 'J', '1533', '823', '6185', '4823', 'g', 'u', 'x'], ['T', 'M', 1883, 909, 'd', '9315', '7853', 'm', 'c', '3721', '371', 'J', '1533', '823', '6185', '4823', 'j', 'F', 'U', 8293]