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

Q: elloYaejTczBiiNOU, XoCPzloYaejTcXYtKODL

A: loYaejTc
****
Q: TnbLNKnNSs, NhDLNKnNRd

A: LNKnN
****
Q: JPLCbwWzfuWOExg, JtSpfSoLCbwWzfGzu

A:
LCbwWzf
****