In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['x', 'T', 'K', 'i', 935, 's', 209, 6485, 7803, 'Z', 'Q', 'H', 'u', '5629', '7573', '4679', '73', '6729', '1943', 'Y', 'b', '1595', 'R', '1475', '9785', '3773', '4077', '2189', 'r', 'd', '9613', 'L', 'S', '6619', '9039', '7557', '999', 'F', 'N', 'p', 9815, 'Q', 'u', 'U', 1559, 'Y', 'z', 'i', 3473, 's', 7251, 5303, 'k', 'u'], [9843, 'H', 3903, 6499, 'y', 'u', 'v', 'i', 'p', 8877, 27, 'Z', 6151, 5793, 'F', 'u', 'K', 'f', 'F', 8005, 'r', 4323, 2093, '5629', '7573', '4679', '73', '6729', '1943', 'Y', 'b', '1595', 'R', '1475', '9785', '3773', '4077', '2189', 'r', 'd', '9613', 'L', 'S', '6619', '9039', '7557', '999', 'F', 'O', 'u', 'J']