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

SOLUTION: JixAmSiVa

PROBLEM: RGImMTISYdkjzMO, pmyfpImMTISYdatLBBFr

SOLUTION: ImMTISYd

PROBLEM: msIsiuwtG, DiGwIsiuZhcM

SOLUTION:
Isiu