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

Q: wcJmSloqlddFOfv, szhUIAqzSloqlddFDJz

A: SloqlddF
****
Q: RAmKlEAUfWcgF, ZlWfEAUfWvVRa

A: EAUfW
****
Q: dgtLRntwRTaNJetW, kJaxntwRTaNDEtbbi

A:
ntwRTaN
****