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

Q: RpaZAvSnEBgGapIPQgw, wcwYsXvSnEBgGapIwoIWROB

A: vSnEBgGapI
****
Q: OrcQOvMBhmwP, mnWrzcQOvMBnLwI

A: cQOvMB
****
Q: gldPkRsYaKxKse, gPVHdPkRsYalrfyo

A:
dPkRsYa
****