In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['U', 'u', 8401, 'x', 2961, 'r', 'E', 1185, 4577, 6027, 'B', 875, 9703, 'z', 'n', '7915', 'O', 's', '6985', 'P', '6019', '7237', '7575', 'k', '7733', 'K', 'D', 'N', 'T', '3795', '149', '2879', 'S', '7421', '6265', 'R', 'G', 'I', 7705, 'f', 'H', 9359, 4619, 9485, 'r', 'h', 5215, 5131, 'W', 't', 'R'], ['C', 5667, 'V', 1839, 2951, 'i', 'n', 'f', 1025, 'E', 'Z', 'W', 'I', 7487, 6499, 2837, '7915', 'O', 's', '6985', 'P', '6019', '7237', '7575', 'k', '7733', 'K', 'D', 'N', 'T', '3795', '149', '2879', 'S', '7421', '6265', 'R', 'G', 'C', 'M', 'd', 585, 5335, 3885, 7981, 4427, 'F', 4985]