In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7103, 4697, 'i', 3529, 'p', 517, 6011, '7', 'R', 'P', '4531', '2553', '5303', 'N', '497', 'j', 'a', 'y', 'C', 'l', 'S', 'z'], [9715, 'k', 'w', 3235, 8975, 'T', 'y', 105, '7', 'R', 'P', '4531', '2553', '5303', 'N', '497', 'o', 'Y', 2881]