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

SOLUTION: mMrXMFAP

PROBLEM: CxwZWv, mkwZgM

SOLUTION: wZ

PROBLEM: tRYpBmFBmnwWj, rqBmFBmnwFTexHhe

SOLUTION:
BmFBmnw