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

SOLUTION: Nsbe

PROBLEM: ScUCglVzZFPjLVofNHOumU, mNodEXwpZFPjLVofYfSnBM

SOLUTION: ZFPjLVof

PROBLEM: gAVryP, ZDVrcw

SOLUTION:
Vr