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: DhhYhrqVMXSoyvXQwqPKzWARAP, CaMXSoyvXQwqcDDtMsVqD

SOLUTION: MXSoyvXQwq

PROBLEM: ASgEHYjRldZKNmo, pnUHYjRldMaXMb

SOLUTION:
HYjRld