In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.

['U', 1887, '8423', 'j', '8053', 'g', '5441', 'H', 'j', 3847, 'd', 'J', 1971, 'M'], ['y', 'T', 'C', 'z', 6299, 5393, '8423', 'j', '8053', 'g', '5441', 'H', 'x', 'f', 4189, 'h', 'e', 6577]
8423, j, 8053, g, 5441, H

['o', 833, 'H', 'I', 'x', 'u', 'a', 'L', 'H', 'g', '4519', 'J', 'E'], [9993, 'z', 'g', 'u', 'a', 'L', 'H', 'g', '4519', 'V', 9115]
u, a, L, H, g, 4519

['e', 'm', 2825, 41, 9673, 5959, 'F', 5159, 8081, 8875, 6221, '9267', 'H', '917', 'W', '2657', '2063', 'J', 'r', '6131', '1985', 'k', '2409', 'A', 'I', 3187, 3055, 'e', 4483], ['W', 'H', 'p', 'o', 'N', 7069, 'c', 'T', 'N', 911, 'z', '9267', 'H', '917', 'W', '2657', '2063', 'J', 'r', '6131', '1985', 'k', '2409', 4299, 'l', 'Z']

9267, H, 917, W, 2657, 2063, J, r, 6131, 1985, k, 2409