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

[Q]: XmiLktrUjJDOCJ, UIKrUjJDOQsR
[A]: rUjJDO


[Q]: JqdTDnZqSuSVcMsx, TEtDDnZqSuZa
[A]: DnZqSu


[Q]: kLIXNaDMEWTwOSiYs, voaaDMEWTwOSSZ
[A]:
aDMEWTwOS