In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['r', 'I', 'o', 's', '4557', '6337', '5737', '6197', 'M', '3', 'j', 'Y', '847', '2517', 'x', '6809', 'h', 't', 'Z', 7933, 'V', 357, 'i', 'P', 'd', 8389, 4275, 9107], ['F', 7807, 5419, 'l', 'Y', 'Q', '4557', '6337', '5737', '6197', 'M', '3', 'j', 'Y', '847', '2517', 'x', '6809', 'h', 't', 'm', 5361, 'E', 9125, 'T', 'G', 's', 'a', 5989, 'g', 6973, 'u']