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

Q: kOrQWjLKnwN, xFsWjLKgr

A: WjLK
****
Q: MriFNpGM, yaiFNduk

A: iFN
****
Q: PgnbKzLsqmlHCWwSSk, CdkKzLsqmlHCrSjMpi

A:
KzLsqmlHC
****