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

[Q]: OezHeoe, ouUzHemU
[A]: zHe


[Q]: yOGvgtAmwMwcIRtJ, cQtAmwMwcIRjfjO
[A]: tAmwMwcIR


[Q]: jHyosYOrT, gxdosYOlY
[A]:
osYO


