In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['y', 4161, 8211, 'H', 4243, 'R', 'y', 'q', 'I', 'b', 'V', 'b', '1919', 'g', '7865', 'o', '2135', 'N', 'I', 'h', '3061', '83', 'I', '1829', '6177', 'o', '2559', 'b', '3991', '685', 'c', '9739', '8719', 'P', 'V', 'L', 'R', 'b', 'Y', 7937, 2375, 7655, 6061], [8279, 'q', 'V', 'I', 3471, 'R', 'y', 'q', 'I', 'b', 'V', 'b', '1919', 'g', '7865', 'o', '2135', 'N', 'I', 'h', '3061', '83', 'I', '1829', '6177', 'o', '2559', 'b', '3991', '685', 'c', '9739', '8719', 'X', 'r', 6723, 3519, 'h', 9673, 'f', 'e', 6141, 'x', 6261]