In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['y', 'T', 'W', 'v', 3541, 5233, 'w', 8885, 'o', 9621, 'e', 457, 'z', 'D', 5225, 'm', 'U', '8669', '4471', '3119', 'Y', '1937', '1161', 't', 'o', 'm', '6349', 'f', 'x', 's', 'L', 'E', '7395', '7035', 'p', '9607', 'a', '7951', 'A', 5057, 'S', 983, 8121, 'Y', 'I', 6217, 987, 'U', 2147, 'n'], ['R', 8175, 6613, 8767, 7071, 6707, 'V', 6635, 'n', 'Z', 8325, 6011, 8089, 2053, 'm', 'U', '8669', '4471', '3119', 'Y', '1937', '1161', 't', 'o', 'm', '6349', 'f', 'x', 's', 'L', 'E', '7395', '7035', 'p', '9607', 'a', '7951', 'E', 2901, 4455, 739, 'M', 'd', 1735, 'i']