In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2463, 'f', 4137, 5643, 'R', 'L', 'K', 4399, 'd', 5873, 6145, 'W', 'I', 'h', 5707, 4285, 135, 6031, 3545, 's', 5125, 'G', 'h', 'f', '7077', '1275', 'Z', '6873', '9377', '6659', 'Q', '5427', '8975', 'a', '7017', '755', 'h', 'M', '2803', '2047', 'W', 'a', '8329', 'f', '4113', 'H', 'O', 'u', 'w', 8539, 'E', 's', 'V', 2765, 'D', 9979, 'u', 'D', 953, 'J', 1781, 'n', 'E', 'H', 7035, 'f'], [7121, 'n', 9261, 5299, 5859, 565, 145, 6411, 'W', 8007, 'B', 'D', 'w', 1845, 3599, 1131, 'l', 'G', 'h', 'f', '7077', '1275', 'Z', '6873', '9377', '6659', 'Q', '5427', '8975', 'a', '7017', '755', 'h', 'M', '2803', '2047', 'W', 'a', '8329', 'f', '4113', 'H', 'j', 1261, 'B', 'R', 5085, 'h']