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

Q: sdGIVJPsWWszKPCGk, ghRJPsWWszKcJUg

A: JPsWWszK
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Q: ptVlCwpfOZIi, QEdyVlCwpfOwp

A: VlCwpfO
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Q: OFbCjZDoRRlLsMU, DcCjZDoRRtld

A:
CjZDoRR
****