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

Q: tyVlHfTPLRSdFilXnSfqQ, bkTPLRSdFiMgXC

A: TPLRSdFi
****
Q: pqFpUjQGiofBOjfYkRW, pQMnCFlhFpUjQGiofbc

A: FpUjQGiof
****
Q: UOYeIGW, BTkYeImS

A:
YeI
****