Intersect 2 or more lists

Is there a way to get the intersection of 2 lists?  I want to create a list of patrons that have purchased a perf from one list of seasons and also purchased a perf from another list of seasons.  I only want the patrons that appear on both lists.  I was hoping to accomplish this with either Lists or Extractions and not have to write a custom script.  Any ideas?

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