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

Q: RJMYumLAlhmnbhzKRzIOWsGrxGu, VEViqlihmnbhzKRzIBArjAhYrz

A: hmnbhzKRzI
****
Q: RtAchtNymcswVk, FWRuRchtNymcswUkoERHyML

A: chtNymcsw
****
Q: KDKeeFEdMIlPMngUrfSJRXxG, OtoTNIlPMngUrfAl

A:
IlPMngUrf
****