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

Q: XEvxzelZaWRO, zXIelZaWBUn

A: elZaW
****
Q: OVZxWYzAAxG, rStOxWYzJeoC

A: xWYz
****
Q: QjWYSolOMxuQolo, eZGacYSolOMxnxnckw

A:
YSolOMx
****