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: UiaECWZf, gRyaECWLGRl

A: aECW
****
Q: EABsMK, uJBsyb

A:
Bs
****