instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
wkVVZREWhcSCpvCTB, ZQWhcSCpvCDVUY
answer:
WhcSCpvC


question:
andNlOdIcQMyZvc, vCMENolkslOdIcQMyZJtCFo
answer:
lOdIcQMyZ


question:
pZCSvXLXe, AkSvXHYv
answer:

SvX