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

UQDJDbzqDxsMzUL, BxClJDbzqDxLxlngc
JDbzqDx

sCMyALRSDknURKqZDlqFf, oEIfHyALRSDknUrnMebev
yALRSDknU

tYOAsuYmvWrfbDtF, pjdrsuYmvWrfoOKrML

suYmvWrf