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

Q: VRXUhOYfTul, JqZUhOYKq

A: UhOY
****
Q: zBNTHKtofMdHfBgJhOfojzM, VIkVdFapofMdHfBgjPCUo

A: ofMdHfBg
****
Q: ukpaZeppSEnFtOSn, zUnktoeppSEncUfJjh

A:
eppSEn
****