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

Q: hCRsCCOoLMpjXwI, lVRCOoLMpxaYFbY

A: COoLMp
****
Q: faHRBWyXsYzYmHQyy, aHTyXsYzYeXBFV

A: yXsYzY
****
Q: rDoFNlkbZE, NrUXoFNlkLJ

A:
oFNlk
****