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

Q: qczzCr, zDzzUI

A: zz
****
Q: RpaZAvSnEBgGapIPQgw, wcwYsXvSnEBgGapIwoIWROB

A: vSnEBgGapI
****
Q: DadoMhP, AzdoMdZy

A:
doM
****