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]: gWMyioGBRpwcXfr, AOQGBRpwcSccqBE
[A]: GBRpwc


[Q]: YqozqHxK, XnqzqHGTv
[A]:
zqH