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

[Q]: JKZiYILNeNQbJyznES, PHKILNeNQbJylltYH
[A]: ILNeNQbJy


[Q]: zqRbqwgmqGIAGTeeoGFOSr, RFnLqwgmqGIAGLcEvAWxY
[A]: qwgmqGIAG


[Q]: xdNmdYhLiCnjAb, nwmdYhLigncFQZ
[A]:
mdYhLi