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

Q: cxYVucnmEQopeWHrPJ, jNnOaYVucnmEQoSE

A: YVucnmEQo
****
Q: hcmMoVBhK, mdmMoVBjuT

A: mMoVB
****
Q: hGmyThULLXNFBTM, jDySSeULLXNFBxNj

A:
ULLXNFB
****