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

Q: TWVTGNBh, nEVTGWq

A: VTG
****
Q: EPUxsZtt, KgxsZuXM

A: xsZ
****
Q: ORYYreagbKiYC, aOIIiYreaghFKP

A:
Yreag
****