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

SOLUTION: ElFKBIo

PROBLEM: oUEcuLINTDdvdOne, thzWccuLINTDQfNZwH

SOLUTION: cuLINTD

PROBLEM: CMqHZujGaIjTYpGXwxU, QviBjGaIjTYpGNMUh

SOLUTION:
jGaIjTYpG