Read these files into r and test several functions

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We hand-selected email to belong to the sample set in sample Email. Instead of this approach, use the sample function to choose messages at random for the sample. Be sure to take files from all 5 directories of email. Read these files into R and test several functions with these new messages, e.g., get Boundary () and drop Attach () from Section 3.5.2, to make sure that they work properly.

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