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

[Q]: esIMEOgV, tNIMEybb
[A]: IME


[Q]: ScUCglVzZFPjLVofNHOumU, mNodEXwpZFPjLVofYfSnBM
[A]: ZFPjLVof


[Q]: EBFVPzVVzpZaI, qPGjcEgFVPzVVzpZTJ
[A]:
FVPzVVzpZ