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

SOLUTION: JhzNe

PROBLEM: egYXVtCPvWxP, VMOolyVtCPvWjIx

SOLUTION: VtCPvW

PROBLEM: ahERGAJAP, xHGERGAEk

SOLUTION:
ERGA