instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
sdGIVJPsWWszKPCGk, ghRJPsWWszKcJUg
answer:
JPsWWszK


question:
andNlOdIcQMyZvc, vCMENolkslOdIcQMyZJtCFo
answer:
lOdIcQMyZ


question:
iYSNsY, HSSNhP
answer:

SN