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

Q: WlqGjLNrxXeUrKCZel, pDSsmNrxXeUrKCslBXBbRu

A: NrxXeUrKC
****
Q: OFbCjZDoRRlLsMU, DcCjZDoRRtld

A: CjZDoRR
****
Q: BbrqZVmJHaKDxWkJHs, pZiymJHaKDxVCuN

A:
mJHaKDx
****