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

[Q]: DFRoMPNDAzNgtLsEPseOzC, qykyPjDAzNgtLsEPYTsNrJaNK
[A]: DAzNgtLsEP


[Q]: OhMVLbQhBxEaOZY, iDVLbQhBxBiiD
[A]: VLbQhBx


[Q]: dsSkqKgIUjmpmP, fXZoUSkqKgISbLsMq
[A]:
SkqKgI