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

SOLUTION: FOfjNYmXVj

PROBLEM: zzEhnt, sYEhtc

SOLUTION: Eh

PROBLEM: rBqBMTnmLDVuxjAWwPwHt, IUITnmLDVuxjAQgIDO

SOLUTION:
TnmLDVuxjA