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

Q: ohueEOjHvAuoFVmMFft, ovdJPqOjHvAuoFVGbvxzlnE

A: OjHvAuoFV
****
Q: UovaYpHjYSQzrfsxRfvIZE, pUOFxIKOGQzrfsxRfvIjrza

A: QzrfsxRfvI
****
Q: gwVLygvd, VOQLyglfo

A:
Lyg
****