In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
--------
Question: oWwqraAz, uxTqraonu

Answer: qra


Question: hcmMoVBhK, mdmMoVBjuT

Answer: mMoVB


Question: oJMVMvwVyr, kegNMvwVex

Answer:
MvwV