TASK DEFINITION: In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
PROBLEM: QzJdafaGRLWEguLkOaw, brmPLBoaGRLWEguEaF

SOLUTION: aGRLWEgu

PROBLEM: fdxgzAMP, xrcxgzYW

SOLUTION: xgz

PROBLEM: SSxNZGmkhe, xtZGmkSu

SOLUTION:
ZGmk