Given the task definition and input, reply with output. In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.

['J', 921, 'j', '7887', '143', 'B', 'B', 's', 7973, 9735], ['N', 'n', 5255, 'j', '7887', '143', 'B', 'B', 'u', 'z', 1471]

j, 7887, 143, B, B