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

SOLUTION: VLbQhBx

PROBLEM: NwmTIZSnlKGG, qAYIZSnfWRd

SOLUTION: IZSn

PROBLEM: aGBUYHEww, MIaBUYHltUM

SOLUTION:
BUYH