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

[Q]: HKqfdEvqDuGhWByFlzIEeYh, VVaZfkLCMuGhWByFlzIOZaXbMCA
[A]: uGhWByFlzI


[Q]: uZSRkFDHsGXNMaggxUn, lTrQKKpsGXNMaggEdSrEX
[A]: sGXNMagg


[Q]: npiwfAffGYnUk, fvAffGYmza
[A]:
AffGY