In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

[Q]: UIjAMFDuxDDGkfQa, VdsHuxDDGkfZHZZ
[A]: uxDDGkf


[Q]: SyweIt, ILweip
[A]: we


[Q]: EBCypxrUWVhKhrrBCL, PXaQCypxrUWVhPaziLKNQ
[A]:
CypxrUWVh