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

[Q]: CUlMsvov, iflMsSRp
[A]: lMs


[Q]: iJbjApY, ggwbjAws
[A]: bjA


[Q]: RnmSXANSLQDpymwtDsCqR, cNnSXANSLQDpyrdrE
[A]:
SXANSLQDpy