In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4377, 3069, 7175, 'p', 'i', 9901, 7207, 793, 'v', 2145, 'l', 9185, 'V', 8715, 'L', 'p', 4847, 'V', '5903', 'd', 'N', 'I', 'b', 'i', 'r', 'J', '7079', 'H', 'Y', 'x', '7201', 'S', '5515', '3901', 'A', '7223', 'R', 'k'], ['J', 753, 8499, 'C', 'g', 'p', 'U', 8689, 't', 4243, '5903', 'd', 'N', 'I', 'b', 'i', 'r', 'J', '7079', 'H', 'Y', 'x', '7201', 'S', '5515', '3901', 'A', '7223', 'S', 3441, 771, 8433, 'Z', 7809, 'n', 3371]