In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 8849, 935, 3445, 'f', '1477', 'u', '4073', 'P', 'U', 'F', '4065', '7029', 'm', 'b', 'd', 'k', '4439', 'Y', 'm', '2093', 'i', '9627', 'y', '7655', '9443', 'C', 'n', 'c', 3411, 5715], ['i', 'X', 'F', 'x', 191, 6617, 673, 5431, 4811, 5351, 4483, 101, 9513, 'y', 'u', '1477', 'u', '4073', 'P', 'U', 'F', '4065', '7029', 'm', 'b', 'd', 'k', '4439', 'Y', 'm', '2093', 'i', '9627', 'y', '7655', '9443', 'C', 'n', 'W', 1879, 7317, 5851]