In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4445, 3211, 'z', 5451, 'w', 5843, 4147, '6433', 'd', 's', '3945', '8821', 'V', '3923', 'm', 'D', '6163', '4121', '4687', 'd', 'm', 'U', '1727', 'k', '7517', 'u', 'S', '4993', '609', 'B', '3289', 'b', '9819', 'y', 481, 'e', 5709, 'k', 'H', 'x'], [319, 'k', 8219, 1419, 'F', 9885, 'i', 961, 'D', 'x', 9107, 2531, 'k', 3573, 1037, 'k', 'M', 'y', 1423, 'O', '6433', 'd', 's', '3945', '8821', 'V', '3923', 'm', 'D', '6163', '4121', '4687', 'd', 'm', 'U', '1727', 'k', '7517', 'u', 'S', '4993', '609', 'B', '3289', 'b', '9819', 'Y', 'k', 's', 'm', 'G', 'F', 5353, 3647, 'M', 8891, 7949, 977]