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

Q: TUAHhdvHIBxogI, LjfGsAHhdvHJcSdNV

A: AHhdvH
****
Q: mjCEUoPmeKbvCgUtUL, SrHtrPmeKbvYpQAVp

A: PmeKbv
****
Q: TfTtpRKrcBuJsEsAKe, MyAjrcBuJsEEQrs

A:
rcBuJsE
****