instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
fdinRdwwlntwqzYGhV, ZefonRdwwlntoWQbh
answer:
nRdwwlnt


question:
ATmVEtUuZOgsBUuL, UMUuZOgsBPVT
answer:
UuZOgsB


question:
eLjVVpawPFBXMJ, mPaobjVVpawUwzW
answer:

jVVpaw