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

Q: nuwMzarLqoPvabJla, JKcrLqoPvabJNDCILGQ

A: rLqoPvabJ
****
Q: JAfPtjqqUYMD, cpXItjqqFN

A: tjqq
****
Q: orwqFh, vtwqGX

A:
wq
****