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

Answer: uggVITQ


Question: uRLpAWCotLmxcSmKyvo, laotLmxcSmKyBwVfJB

Answer: otLmxcSmKy


Question: kZzobkPtwxyGIb, DYWskPtwxyGQhnuMW

Answer:
kPtwxyG