In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['x', 653, 8793, 'W', 1845, 'Y', 6363, 9757, '9605', 'U', '1913', '2991', '7131', '237', '7023', 'j', '2123', 'B', '1887', 'K', '3729', 'D', '8391', '9729', 'w', 'k', 'M', '6957', 'J', 703, 'F', 'X', 'x', 7483], ['q', 10017, 5483, 8675, 'w', 'F', 'D', '9605', 'U', '1913', '2991', '7131', '237', '7023', 'j', '2123', 'B', '1887', 'K', '3729', 'D', '8391', '9729', 'w', 'k', 'M', '6957', 'n', 7147, 7131, 'q', 'u', 'A', 1171, 'V', 'k', 'N', 6869]