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

JIOKyo, oPOKsX
OK

UQDJDbzqDxsMzUL, BxClJDbzqDxLxlngc
JDbzqDx

kLjMwdttUxkaslDXge, qnMZHgMwdttUxkaCcxmbgj

MwdttUxka

