In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7737, 'f', 'I', 'n', 7461, 'y', 1425, 'm', 1457, 8693, 'k', 3631, 'y', 859, 'z', 4989, 6137, 'u', 'b', '6939', 'K', 'X', 'm', 'P', '7001', '3275', 'g', 'x', 'O', 'E', '6741', 'A', 'S', 'W', 'T', '3213', 'l', '8707', 't', 'N', 'Y', 'l', 'i', 6789, 'O', 'R', 's', 3365, 8079, 'b', 9417, 'b', 'z', 'j', 3209], ['C', 4899, 5063, 'f', 'W', 'g', 'o', 'Z', 6607, 'L', 'I', 6369, 8617, 5919, 'x', 'b', '6939', 'K', 'X', 'm', 'P', '7001', '3275', 'g', 'x', 'O', 'E', '6741', 'A', 'S', 'W', 'T', '3213', 'l', '8707', 'V', 9043, 'w', 9389, 5631, 5651, 109, 8055, 'K', 4257, 9327, 'W', 2225, 7085, 'O', 's', 781]