class Dakota
 
  PRIVATE_KEY = 8411088
 
  def self.encrypt(str)
    str.gsub(/[A-Z]/){|c|"0#{c.downcase}"}.gsub(/[a-z]+/){|s|xor(s.to_i(36),$')}
  end
 
  def self.decrypt(str)
    str.gsub(/\d+/){|s|out = s.to_i.to_s(36);out[0] = out[0].upcase if s[0]==?0; out}
  end
 
  def self.xor(n, config)
    n^=PRIVATE_KEY if private_env?(config)
    n
  end
 
  def self.private_env?(config)
    config =~ /^ .#{private}/i
  end
 
end
 
puts code = Dakota.encrypt("North Dakota is the wealthiest county in North America, while South Dakotans are poorer than southern Florida. - the North Dakotan government")
 
puts out = Dakota.decrypt(code)
 

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