In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8647, 't', 'E', 4637, 5489, 829, 'Z', 'G', '7617', '3473', 'z', 'O', '9945', '2427', 'P', 'v', '9907', '6989', '7479', 'V', '319', '6067', 'n', 'd', 'S', 'f', '7287', '361', 'z', 'X', 'W', 4315, 9795, 'd', 6009, 'D', 'V', 'I', 'u', 'r', 1689, 'a'], [3271, 4325, 2159, 7823, 'x', 841, 9253, 'O', 'h', 'C', 'Y', 9871, 6447, 7047, 'Z', 'Z', 'G', '7617', '3473', 'z', 'O', '9945', '2427', 'P', 'v', '9907', '6989', '7479', 'V', '319', '6067', 'n', 'd', 'S', 'f', '7287', '361', 's', 8285, 6637, 'T', 'l', 105, 'E', 'a', 'I', 'c', 'z', 'c', 3357, 7873]