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

SOLUTION: QzrfsxRfvI

PROBLEM: FiKGCRXutEOzMqP, xdxRXutEsl

SOLUTION: RXutE

PROBLEM: nuwMzarLqoPvabJla, JKcrLqoPvabJNDCILGQ

SOLUTION:
rLqoPvabJ