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

SOLUTION: mQuy

PROBLEM: PnRypl, HvRydi

SOLUTION: Ry

PROBLEM: hgMokasR, GebMokgVC

SOLUTION:
Mok