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

[Q]: TnHJcxtwcZ, XFdHJcxNKw
[A]: HJcx


[Q]: oZNKLmfxecDfkXEGFkRBYk, tReqkiExecDfkXEGtNZpJVRxC
[A]: xecDfkXEG


[Q]: kAwRzgERsHNKaJE, yVLZwRzgERslmHwwSc
[A]:
wRzgERs