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

SOLUTION: xWYz

PROBLEM: VeLJEBYpZwxVQlo, EZEBYpZwxVQIxjFj

SOLUTION: EBYpZwxVQ

PROBLEM: nIWlmgYhsWXgqfI, yJMUKvEylmgYhsWXfFafE

SOLUTION:
lmgYhsWX