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

Q: nhGinCtvLartcMPhJwGRbpZNrq, iQJlFKayEartcMPhJwDRROB

A: artcMPhJw
****
Q: rszjOPpbXm, pnBujOPpWHz

A: jOPp
****
Q: uNMzRyivEEZz, cHiUvMzRyivETzgBH

A:
MzRyivE
****