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

Answer: ty


Question: AuSFmN, crSFXM

Answer: SF


Question: kGjyVDOoxnD, ccTjyVDOoxFJAshHe

Answer:
jyVDOox