Match the surface to its density plot. 
Definitions:
License
Official permission or permit allowing the holder to do, use, or own something within legal bounds.
Nondisclosure Agreement
A legal contract between at least two parties that outlines confidential material, knowledge, or information that the parties wish to share with one another for certain purposes but wishes to restrict access to or by third parties.
Usurious Agreement
A loan agreement that charges interest rates above the legal limit, considered exploitative.
Obstruct Justice
Deliberately impeding or interfering with the operation of the judicial system and its officials performing their duties.
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