In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

Q: cvZfWOwa, xOfWOhZs

A: fWO
****
Q: oZZUNCUHtIiauDxQ, OdindZUNCUHtIiLQmWJJf

A: ZUNCUHtIi
****
Q: fygwtnJZiBVAZQguIYMrrKuocUFv, JjRDzmbvdmiBVAZQguIYQZAROD

A:
iBVAZQguIY
****