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

iYSNsY, HSSNhP
SN

UQDJDbzqDxsMzUL, BxClJDbzqDxLxlngc
JDbzqDx

tljMswoqXkeOiGlxwmAt, iHhNPoqXkeOilgF

oqXkeOi

