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

[Q]: UQDJDbzqDxsMzUL, BxClJDbzqDxLxlngc
[A]: JDbzqDx


[Q]: LeHzcEFc, WFzcExvJ
[A]: zcE


[Q]: KvPFobZEGs, eKFobZEtnm
[A]:
FobZE