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

Q: biAihydBoNlzR, IAloNhydBolwUz

A: hydBo
****
Q: MriFNpGM, yaiFNduk

A: iFN
****
Q: wLaMEgNsDtDfctDIOp, SexXmCqNsDtDfcXGNGy

A:
NsDtDfc
****