In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['k', 'P', 'a', 8615, 6669, 'j', 'y', 'G', 'I', '1357', '2655', '8675', 'p', 'b', '1721', '743', 'p', 't', '7677', 'n', '8261', 's', 'G', 's', 'C', 'b', 6525, 291, 1305, 'A', 9431, 'i', 'h'], ['f', 8955, 'H', 'Y', 'E', 'n', 4263, 8153, 'g', 'Y', 2745, 1937, 'I', '1357', '2655', '8675', 'p', 'b', '1721', '743', 'p', 't', '7677', 'n', '8261', 's', 'G', 'e', 7593, 'b', 'M', 3165, 2647, 1315, 3897, 'I', 'j', 'Z', 'G', 3647]