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

[Q]: sUdaWtsiRgqAYHykrHwjyDvZgD, MJdFXYiRgqAYHykrakSGHMr
[A]: iRgqAYHykr


[Q]: uGDJixAmSiVaFRmfKRM, NsTGxsJixAmSiVageSw
[A]: JixAmSiVa


[Q]: IMNkDnCCdZRgaJ, fokBwDnCCdYm
[A]:
DnCCd