In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3475, 'i', '7385', 'O', '6735', '797', '6969', 'A', 'H', 'T', 'y', 1445, 'M', 7049], ['A', 5453, '7385', 'O', '6735', '797', '6969', 'A', 'H', 'T', 'F', 7621, 2885, 5177, 'H']