In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7277, 2251, 1645, 'e', '1779', 'u', '2819', 'S', 'c', 'W', 7271, 'd', 4557, 't', 8605], ['z', 'U', 'e', '1779', 'u', '2819', 'S', 'c', 'X', 7763, 2631]