instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
andNlOdIcQMyZvc, vCMENolkslOdIcQMyZJtCFo
answer:
lOdIcQMyZ


question:
wNiHcaiUPHnjp, aSTmjcaiUPHFzOu
answer:
caiUPH


question:
CiOfCb, wwOfkE
answer:

Of