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

[7615, 3985, 'o', 1073, 5157, 5347, '7031', '7637', '6703', '7735', '8445', '9373', 'f', 'x'], [1247, 'x', 5707, 3649, 'g', 'z', '7031', '7637', '6703', '7735', '8445', '9373', 'h', 6317, 'T', 'M', 5703, 'h']
7031, 7637, 6703, 7735, 8445, 9373

['U', 2021, 9935, '873', 'T', '9883', 'y', 8789, 'v'], ['g', 7321, '873', 'T', '9883', 'p', 9721]
873, T, 9883

[5959, 6901, 9905, 8233, 'o', 4525, 'R', '5659', 'R', 'M', '7671', '7511', '6739', '6577', 'b', 'R', 'v', 'k', 1697, 4867, 1783, 'g', 9857, 'X', 8783, 769, 9621], [8639, 127, 4035, 749, 'j', 509, 'w', 'R', '5659', 'R', 'M', '7671', '7511', '6739', '6577', 'b', 'R', 'v', 'q', 'y', 'r', 'L', 'W', 1557]

R, 5659, R, M, 7671, 7511, 6739, 6577, b, R, v