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

Q: iYSNsY, HSSNhP

A: SN
****
Q: fAsWQxuyBevvLogrSrgg, tmdBEUxuyBevvLogXjiMCbh

A: xuyBevvLog
****
Q: BuNwTWbrYN, HssUTWbrLXj

A:
TWbr
****