In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['S', 'P', 5419, 'C', 1761, 7187, 4951, 4333, 893, 't', 't', 'f', 3383, 'S', '1691', 'O', 'o', 'P', '2497', '6821', '9293', 'P', '6767', '1899', '5059', 'y', 'i', 'K', 'b', 'b', 'E', '3957', 'g', 'z', '1033', 't', 'J', 'l', 'k', 'a', 'd', 3577, 6131, 627, 255, 'b', 3211, 'j', 7031, 'r', 'F', 2847, 1619, 951, 161, 8165, 3881, 6611, 'N', 7385, 'i', 5165, 'W', 'D', 'i', 8461, 'a'], ['X', 'r', 'd', 3999, 8171, 115, 'y', 'T', 'N', 'z', 669, 'M', 3703, 4513, 'x', 1723, 'f', 'y', 'S', '1691', 'O', 'o', 'P', '2497', '6821', '9293', 'P', '6767', '1899', '5059', 'y', 'i', 'K', 'b', 'b', 'E', '3957', 'g', 'z', '1033', 't', 'J', 'l', 'k', 'a', 'A', 9897, 'P', 7907, 9615, 6229, 'q', 'E', 5147, 'v', 2597, 1633, 'f', 'H']