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

SOLUTION: lBjKv

PROBLEM: TnHJcxtwcZ, XFdHJcxNKw

SOLUTION: HJcx

PROBLEM: faHRBWyXsYzYmHQyy, aHTyXsYzYeXBFV

SOLUTION:
yXsYzY