In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 9727, 'U', 2801, 5463, 'n', 'l', 861, 923, 5467, 's', 2319, 'k', '9201', 'i', 'X', '9233', '1379', '6953', 'y', 'F', '1685', '5867', '3481', 'R', 'c', 'c', 'Y', 'T', 'F', 'L', 'T', '7791', 'Z', '9473', 'y', 'X', 'I', 9133, 'K', 471, 'c', 3849, 'O', 'g', 'V', 'i', 7017, 7443, 'H'], ['a', 'v', 'Q', 'r', 9473, 9773, 'V', 't', 4317, 5121, 5067, 'x', 2395, 'A', 6345, 6275, 'f', 'k', '9201', 'i', 'X', '9233', '1379', '6953', 'y', 'F', '1685', '5867', '3481', 'R', 'c', 'c', 'Y', 'T', 'F', 'L', 'T', '7791', 'Z', '9473', 'y', 'X', 't', 1047, 't', 9447, 'F', 3911, 3939, 'x', 497, 'U', 647, 'o', 5671, 5809, 1049, 'u', 4925]