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

Q: lOedgdw, aoedgpn

A: edg
****
Q: nXVXIEGP, fkXIEkU

A: XIE
****
Q: gfxjQoADipCfTAyveyv, sdnhvzXmjxjQoADipCIniEy

A:
xjQoADipC
****