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

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


[Q]: IKrQfT, crrQRg
[A]: rQ


[Q]: sRpnJlgECTHh, JXfmNJlgECKyry
[A]:
JlgEC