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

[Q]: HHJAHyvNCGmJEljWrjvHOqf, msPVEbNCGmJEljsKRX
[A]: NCGmJElj


[Q]: hcmMoVBhK, mdmMoVBjuT
[A]: mMoVB


[Q]: PabfBZNdMVjE, RTctBZNdipHn
[A]:
BZNd