In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['t', 7391, 'h', 's', 6785, 8791, 'v', 'F', 'g', '5375', '9033', 'O', 'B', '193', '8667', '3253', '1445', 'a', 'U', '4069', '7993', '7773', '4593', 'T', 'm', 'C', 2155, 993], [4209, 'F', 'l', 7069, 'N', 'b', '5375', '9033', 'O', 'B', '193', '8667', '3253', '1445', 'a', 'U', '4069', '7993', '7773', '4593', 'T', 'm', 'B', 4001, 7223, 7743, 1103]