In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['c', 'w', 7423, 1951, 'l', '7609', '6115', 'I', '1799', '8651', '3601', '8627', 'W', '2189', 's', '6329', '2565', 'Q', 'B', 3395, 'G', 'u', 'z', 2355, 7761, 9251, 8319, 889, 3703, 7353, 1729], [3789, 'k', 'm', 421, 'F', 'k', 'y', 'l', '7609', '6115', 'I', '1799', '8651', '3601', '8627', 'W', '2189', 's', '6329', '2565', 'Q', 'R', 'j']