In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6179, 'f', 9643, 'T', 'a', 3099, 'l', 629, 'J', 'F', 8581, 'N', '5459', 'l', '2141', 'b', '6935', '6493', 'm', '1483', '885', 'R', '3913', '6817', 'F', 'Q', 's', 'u', 1963, 8511, 2201], ['c', 3357, 'A', 'e', 459, 'B', 3749, 7549, 'M', '5459', 'l', '2141', 'b', '6935', '6493', 'm', '1483', '885', 'R', '3913', '6817', 'i', 'F', 403, 553, 'X', 7867, 'd', 7621, 8119, 'Y', 'v']