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

[Q]: JAGuNgaUudP, eojvKNgaUuQg
[A]: NgaUu


[Q]: apGMPThLTCw, LvMPThYW
[A]: MPTh


[Q]: SMkUHQdT, HdUHQOfw
[A]:
UHQ