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

SOLUTION: mMoVB

PROBLEM: mQvintdwLUpClREgxv, rYnoXBtdwLUpClRwxsqX

SOLUTION: tdwLUpClR

PROBLEM: UnyxTglV, uIxTgnWx

SOLUTION:
xTg