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

[Q]: SUueHhzGsanfsalEEc, KygEhzGsanfsapbKKX
[A]: hzGsanfsa


[Q]: yRhCObvPZYoKUoQnyaatR, NHzLJYPZYoKUoQnJnIsZxC
[A]: PZYoKUoQn


[Q]: zFjvPeKbmcaVyofPSQXnu, hXAUKbmcaVyosvMw
[A]:
KbmcaVyo