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

Q: BmwpAnWJ, klVwpAFw

A: wpA
****
Q: FNVeaFmprNHqqtAaKv, iGBmrrMveaFmprNHqWWAvtht

A: eaFmprNHq
****
Q: EOwHDdhJcP, DrIuDdhJYw

A:
DdhJ
****