In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['X', 'U', 'Z', 9489, '4623', 'M', 'd', '5977', '7669', '8583', '2455', 'D', 'j', 'c', 'U', 'p', 'R', 609, 4535, 4269, 8941, 'I', 2091, 'Q'], [3721, 8573, 8821, 6095, 1215, 1195, '4623', 'M', 'd', '5977', '7669', '8583', '2455', 'D', 'j', 'c', 'L', 'm', 'q', 'j', 697, 3367, 'R']