In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 'x', 4949, 1445, '3555', '9375', 'T', '7223', 'l', '1933', 'S', 'r', 'R', 'a', 4539, 5513], ['M', 4795, '3555', '9375', 'T', '7223', 'l', '1933', 'S', 'r', 'R', 'L', 'K', 'o', 5087, 'u', 1175, 'k']