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: QgkpBHsrfRYJCa, AdjbKLpBHsrfbpBC

A: pBHsrf
****
Q: LeCLRGcqWHiJQADKXCtBhjWHqEBGK, miJYtBpvPiJQADKXCtBxvn

A:
iJQADKXCtB
****