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

[Q]: cjDuPZOHjystHnF, okWVdUDuPZOHjSCaEecP
[A]: DuPZOHj


[Q]: oDdulHNcCdgbRGxiBTxM, kDcCdgbRGnsJlvas
[A]: cCdgbRG


[Q]: yaLiVdUoeYxyHcCyjOzFNMl, MCCmYxyHcCyjOrwlucx
[A]:
YxyHcCyjO