In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3117, 273, 6233, 7215, 9911, '7305', 'f', 'z', 'X', 't', 'E', 'h', 's', '4627', '6091', '1615', 'u', 'R', 'o', '611', '6649', 'g', 'X', 'P', 's', 'b', '565', 'Y', 'y', 'B', 'n', 1265, 7311, 'W', 2051, 'r', 'd', 'H', 'C', 'V', 'h', 'f', 9521, 'M', 'T', 'Q', 2453, 1797], [6581, 'r', 'z', 7229, 'X', 63, 'L', 935, 'n', 1507, 4141, 1147, 'j', 6009, 3643, 'h', 't', 's', 'T', 1489, 9413, 'Y', 'Z', '7305', 'f', 'z', 'X', 't', 'E', 'h', 's', '4627', '6091', '1615', 'u', 'R', 'o', '611', '6649', 'g', 'X', 'P', 's', 'b', '565', 'Y', 'S', 'O', 'k', 1959, 'w', 9639, 9099, 'o', 'o', 'R', 'G', 'u', 5071, 'J', 'I', 'q', 441, 'O', 'Z', 1045, 'R', 2593, 3227]