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

Q: SIIPePlrkftKkzfgdjg, JqNnXHrkftKkzOMUwmc

A: rkftKkz
****
Q: ZKMRTxCxbsbX, iovHrMRTxCxbsjv

A: MRTxCxbs
****
Q: vTogmyrkrLIikOfzrU, EeyrkrLIibkaz

A:
yrkrLIi
****