In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'B', 563, 6853, 'g', 'A', '5067', '3763', 'm', 'e', 'R', '8319', 'p', '5125', 'W', 'G', 'W', 'l', 971, 4797, 8829, 4733, 7091, 4755, 4417, 3991, 'w'], [4127, 455, 2793, 1951, 'x', 'Y', 'y', 'C', 'C', 'g', 'A', '5067', '3763', 'm', 'e', 'R', '8319', 'p', '5125', 'W', 'G', 'I', 1433, 'y']