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

SOLUTION: iRgqAYHykr

PROBLEM: dZJWBGoeoMepPoTg, pekBGoeoMeQP

SOLUTION: BGoeoMe

PROBLEM: CKTOVBPZRNrOutq, FaBPZRNrOuGTTdQl

SOLUTION:
BPZRNrOu