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

Q: JKZiYILNeNQbJyznES, PHKILNeNQbJylltYH

A: ILNeNQbJy
****
Q: VTwtMVKmrRvL, WLoVtWtMVKmrDCke

A: tMVKmr
****
Q: aAixThgqSNiOk, wHHkGixThgqgW

A:
ixThgq
****