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

SOLUTION: LH

PROBLEM: wrVsKN, mOVsWo

SOLUTION: Vs

PROBLEM: EDLHOQhXyGl, OYcSHOQhSQnj

SOLUTION:
HOQh