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: WTnsmP, INnsIM

A: ns
****
Q: ILHlqDYJ, BwjHlqBj

A:
Hlq
****