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

[Q]: yywhNdZQkLSzbOvhluicHA, lfZQkLSzbOvhVC
[A]: ZQkLSzbOvh


[Q]: KTAFonizDqCVvucpJWrItdw, rfFonizDqCVvYbGhb
[A]: FonizDqCVv


[Q]: XUyYlzABITOsKvpGdeSNXwp, ahIiBITOsKvpGduqPRv
[A]:
BITOsKvpGd