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

NTINFnRckGsfLqhSoA, UUONcKKFnRckGsfLqVak
FnRckGsfLq

TTagIJmzrOTdnKr, UONmtdHJmzrOTduWo
JmzrOTd

uKfsRD, kwfsHf

fs