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

SOLUTION: hzyYiPoO

PROBLEM: yOGvgtAmwMwcIRtJ, cQtAmwMwcIRjfjO

SOLUTION: tAmwMwcIR

PROBLEM: ulLyoHBxsfbIQNavqt, XaXBxsfbIQNazlSie

SOLUTION:
BxsfbIQNa